Fix layer actions and add reusable color editors

Components/MenuHelp.razor

@@ -0,0 +1,114 @@
+<details class="menu-help">
+    <summary>
+        <span aria-hidden="true">?</span>
+        <strong>Guida rapida</strong>
+    </summary>
+    <div class="menu-help-content">
+        <p>@Introduction</p>
+        <ol>
+            @foreach (var instruction in Instructions)
+            {
+                <li>@instruction</li>
+            }
+        </ol>
+    </div>
+</details>
+
+@code {
+    [Parameter, EditorRequired]
+    public string Topic { get; set; } = string.Empty;
+
+    private string Introduction => Topic switch
+    {
+        "layers" => "Qui controlli visibilita, ordine, selezione e organizzazione di tutti gli oggetti presenti sulla mappa.",
+        "cadastre" => "Trova una particella nel catalogo catastale e mostrane il confine ufficiale sulla mappa.",
+        "data" => "Importa file GIS, crea disegni e misure oppure aggiungi punti di interesse.",
+        "save" => "Esporta gli elementi della mappa in un file compatibile con altre applicazioni GIS e GPS.",
+        "projects" => "Salva il lavoro completo, riaprilo, organizzalo e recupera revisioni o copie di sicurezza.",
+        "tools" => "Consulta e gestisci gli oggetti in modo avanzato, controlla le coordinate e prepara mappe offline.",
+        "settings" => "Personalizza mappa, salvataggi, GPS, sincronizzazione e servizi esterni.",
+        _ => "Consulta le indicazioni essenziali per usare questo pannello."
+    };
+
+    private IReadOnlyList<string> Instructions => Topic switch
+    {
+        "layers" =>
+        [
+            "Visibilita: usa la casella di una categoria o di un gruppo per mostrare o nascondere tutti i suoi contenuti; la casella del singolo oggetto agisce solo su quello.",
+            "Gerarchia: premi la freccia accanto alla maniglia per aprire un gruppo. Il rientro, il carattere e la tonalita indicano se una riga e figlia, nipote o di livello successivo.",
+            "Selezione multipla: attiva il flag sulle righe desiderate. Esempio: seleziona tre poligoni per esportare solo quelli oppure per bloccarli con una sola operazione.",
+            "Rinomina e attributi: Rinomina modifica il nome mostrato e salvato nei progetti e nei file esportati; Attributi apre un editor multilinea per consultare o correggere i dati associati.",
+            "Colori: espandi un padre o un figlio e usa gli editor di linea e riempimento. Puoi scegliere il colore, prelevarlo con il contagocce se supportato, oppure inserire e copiare i valori HEX, RGB e HSL; sul padre viene applicato a tutto il gruppo.",
+            "Blocco: il lucchetto impedisce modifiche e spostamenti involontari. Sblocca l'oggetto prima di usare la matita o gli strumenti geometrici.",
+            "Sposta nel gruppo cambia l'appartenenza. Esempio: trasferisci un poligono da Disegni e POI a Progetti e dati importati, oppure in un nuovo sottogruppo chiamato Rilievo nord.",
+            "Sposta geometria cambia invece le coordinate dell'oggetto, per esempio 100 metri verso nord; non modifica il gruppo di appartenenza.",
+            "Rimuovi dal progetto nasconde l'elemento e lo esclude dai salvataggi successivi; Elimina lo sposta nel cestino. Usa gli strumenti avanzati per ripristinare l'ultima rimozione o svuotare definitivamente il cestino.",
+            "Ordine: trascina la maniglia di una riga verso l'alto o il basso per cambiare la sovrapposizione sulla mappa."
+        ],
+        "cadastre" =>
+        [
+            "Compila i campi nell'ordine Regione, Comune, Foglio e Particella: ogni scelta carica l'elenco necessario al campo successivo.",
+            "Esempio: scegli Campania, il Comune, il foglio 12 e la particella 345, poi premi Mostra particella sulla mappa.",
+            "Il confine ufficiale viene evidenziato sulla mappa. Se Centra e zooma quando seleziono un oggetto e attivo nelle Impostazioni, la mappa lo inquadra automaticamente.",
+            "Se la particella e gia presente tra disegni, progetti o file GeoJSON, KML e KMZ, l'app riconosce il riferimento catastale o la geometria e riutilizza l'oggetto esistente senza duplicarlo.",
+            "Se un oggetto gia presente era nascosto, viene reso nuovamente visibile. La visibilita generale dei contorni evidenziati e dei dati importati resta controllabile dal pannello Layer.",
+            "Quando il servizio ufficiale non restituisce subito il confine, attendi il completamento indicato nel pannello e riprova mantenendo gli stessi dati selezionati."
+        ],
+        "data" =>
+        [
+            "Importazione: premi Carica KML, KMZ o GeoJSON e scegli il file dal dispositivo. I nomi e gli attributi riconosciuti vengono mantenuti.",
+            "Per KML e KMZ, Includi anche il layer del foglio importa pure cornici e riquadri generali; disattivalo quando vuoi conservare soltanto le particelle riconosciute.",
+            "Usa Mostra dati importati e Mostra cornice per controllare separatamente la visibilita. Inquadra dati porta la mappa sull'estensione completa del file.",
+            "Disegno: premi Mostra strumenti sulla mappa, torna alla mappa e scegli linea, poligono, rettangolo, cerchio o POI nella barra Leaflet.",
+            "Modifica ed eliminazione possono agire sull'oggetto selezionato o su tutti i disegni. Prima seleziona sulla mappa la linea o il poligono interessato, poi scegli l'ambito dal piccolo comando accanto alla matita o al cestino.",
+            "Annulla e Ripristina coprono disegni, spostamenti, rinomine ed eliminazioni recenti. Recupera ultimo autosalvataggio ricarica invece l'ultima copia locale creata automaticamente.",
+            "Esempio POI: porta il centro della mappa sull'ingresso di un terreno, scrivi Cancello nord e premi Aggiungi POI al centro mappa.",
+            "Per rinominare, bloccare o trasferire un oggetto in un altro gruppo, apri Layer e usa i comandi della relativa riga."
+        ],
+        "save" =>
+        [
+            "Inserisci un nome riconoscibile, per esempio Rilievo particelle 12-345, poi scegli il formato in base all'uso previsto.",
+            "GeoJSON e adatto ai software GIS e conserva geometrie, nomi e attributi; KML e KMZ sono adatti a Google Earth, con KMZ piu compatto per invio e archiviazione.",
+            "GPX e pensato per dispositivi e applicazioni GPS; PDF crea un rapporto consultabile e stampabile invece di un file vettoriale modificabile.",
+            "Attiva solo le categorie da includere. Esempio: per consegnare disegni e particelle importate senza la traccia GPS, lascia attive quelle due voci e disattiva Traccia GPS.",
+            "Solo oggetti selezionati esporta esclusivamente le righe contrassegnate nel pannello Layer. Se non devi filtrare manualmente, lascia questa opzione disattivata.",
+            "Premi Esporta e salva file e scegli la cartella o l'app di destinazione proposta dal dispositivo.",
+            "Nomi rinominati e attributi vengono salvati in GeoJSON, KML e KMZ. Gli sfondi satellitari, stradali e WMS non vengono incorporati nei file vettoriali."
+        ],
+        "projects" =>
+        [
+            "Nuovo progetto: inserisci un nome, scegli se includere i contorni catastali evidenziati e premi Salva progetto. Vengono conservati oggetti, gruppi, nomi, attributi e opzioni di visualizzazione.",
+            "Aggiornamento: dopo aver aperto un progetto, usa di nuovo Salva progetto con lo stesso nome per aggiornarlo. Se nelle Impostazioni attivi Aggiorna automaticamente il progetto aperto, le modifiche vengono registrate dopo 3 secondi di inattivita.",
+            "Cartelle: seleziona un progetto, scrivi per esempio Cantieri 2026 e premi Sposta per organizzarlo nell'archivio; questa operazione non sposta le geometrie sulla mappa.",
+            "Duplica crea una copia modificabile, utile prima di una variante importante o quando ricevi un progetto in sola lettura.",
+            "Archivia nasconde logicamente i lavori conclusi senza eliminarli; Ripristina li riporta tra quelli attivi. Elimina rimuove invece il progetto dall'archivio.",
+            "Condividi modificabile consente al destinatario di continuare il lavoro; Condividi in sola lettura protegge l'originale e richiede una duplicazione per modificarlo.",
+            "Revisioni: seleziona una data e usa Apri revisione per consultarne lo stato oppure Confronta per vedere le differenze con la versione corrente.",
+            "Backup: Crea backup raccoglie tutti i progetti in un file trasferibile. Ripristina backup ricarica un archivio completo; Importa progetto aggiunge invece un singolo progetto condiviso."
+        ],
+        "tools" =>
+        [
+            "Tabella oggetti: apre una vista ordinata di particelle, file importati e disegni. Usa i flag per selezionare piu righe e il lucchetto per proteggerle dalle modifiche.",
+            "Coordinate WGS84 e UTM: scegli un punto sulla mappa per leggere latitudine e longitudine oppure le coordinate metriche UTM, utili per rilievi e confronti tecnici.",
+            "Registro operazioni: mostra in ordine cronologico disegni, modifiche, rinomine, spostamenti ed eliminazioni, cosi puoi capire cosa e cambiato durante la sessione.",
+            "Cestino: Ripristina ultima rimozione recupera l'elemento eliminato piu recente. Svuota cestino elimina definitivamente tutti gli elementi rimossi e non consente ulteriori recuperi.",
+            "Mappe offline: prima inquadra sulla mappa la zona che ti servira sul campo, quindi scegli quanti livelli di zoom aggiuntivi scaricare. Valori maggiori offrono piu dettaglio ma richiedono piu spazio e tempo.",
+            "Esempio offline: inquadra il cantiere e le strade di accesso, imposta 2 livelli aggiuntivi e premi Scarica area visibile mentre hai connessione.",
+            "Usa mappe offline seleziona lo sfondo salvato localmente; Svuota archivio libera lo spazio occupato dalle tessere scaricate."
+        ],
+        "settings" =>
+        [
+            "Mappa e sfondo: scegli la cartografia di base e regola Trasparenza catasto per leggere meglio confini e immagini sottostanti. Esempio: riducila quando le linee coprono dettagli del terreno.",
+            "Autosalvataggio locale dopo ogni modifica: se attivo, ogni disegno, modifica, rinomina o eliminazione aggiorna immediatamente una copia di recupero nel dispositivo. Per usarla apri Dati e disegni e premi Recupera ultimo autosalvataggio.",
+            "Aggiorna automaticamente il progetto aperto: funziona solo dopo aver aperto o salvato un progetto modificabile. Dopo una modifica attende 3 secondi senza altre operazioni e aggiorna quel progetto; un progetto in sola lettura non viene mai sovrascritto.",
+            "Backup automatico: scegli Giornaliero o Settimanale. Alla successiva pressione di Salva progetto, se e trascorso l'intervallo, viene creata una copia interna di tutti i progetti; l'app conserva le 10 copie automatiche piu recenti. Disattivato non crea nuove copie programmate.",
+            "Esempio consigliato: lascia attivo l'autosalvataggio locale, attiva l'aggiornamento del progetto aperto durante i rilievi e imposta un backup giornaliero. Prima di modifiche importanti crea anche un backup manuale dal menu Progetti.",
+            "Aggancio ai vertici: avvicinando un nuovo vertice a uno esistente, l'app lo allinea entro la distanza in pixel scelta. Aumenta la distanza su schermi piccoli; riducila quando ci sono molti vertici ravvicinati.",
+            "Centra e zooma quando seleziono un oggetto: attivalo per inquadrare automaticamente ogni elemento scelto; disattivalo se vuoi mantenere ferma la vista mentre lavori dall'elenco Layer.",
+            "WebDAV: inserisci indirizzo, utente e password applicazione, salva la configurazione, poi usa Invia al cloud per caricare il backup o Scarica dal cloud per ripristinare quello remoto.",
+            "GPS e percorso: Mostra punto visualizza posizione e precisione; Registra traccia memorizza il cammino; distanza e avvisi aiutano a controllare l'avvicinamento e l'attraversamento del confine selezionato.",
+            "Google Maps e Azure Maps richiedono le rispettive chiavi solo quando scegli quegli sfondi. Controlla nuova versione confronta la versione installata con l'ultima pubblicata e mostra le relative modifiche."
+        ],
+        _ => []
+    };
+}

Components/Pages/Home.razor

@@ -8,6 +8,8 @@
 @inject AzureMapsService AzureMapsService
 @inject ProjectStorageService ProjectStorageService
 @inject MapExportService MapExportService
+@inject CloudSyncService CloudSyncService
+@inject AppUpdateService AppUpdateService
 @implements IAsyncDisposable
 
 <PageTitle>LME Mappe Catastali</PageTitle>
@@ -19,9 +21,11 @@
         <header class="map-toolbar">
             <div class="app-identity">
                 <strong>LME Catasto</strong>
-                <span>@Status</span>
+                <span class="app-status-line">@Status @if (HasUnsavedChanges) { <i title="Modifiche non salvate"></i> }</span>
             </div>
             <div class="toolbar-actions">
+                <button class="map-icon-command" title="Annulla ultima operazione" aria-label="Annulla" @onclick="UndoMapChange">↶</button>
+                <button class="map-icon-command" title="Ripristina operazione" aria-label="Ripristina" @onclick="RedoMapChange">↷</button>
                 <button class="toolbar-button layer-button @(LayerPanelOpen ? "is-active" : null)"
                         title="Layer catastali"
                         aria-expanded="@LayerPanelOpen"
@@ -29,10 +33,25 @@
                     <span class="layer-symbol" aria-hidden="true"></span>
                     <span>Layer</span>
                 </button>
-                <button class="toolbar-button" @onclick='() => SelectTab(ActiveTab == "search" ? "map" : "search")'>Cerca</button>
+                <button class="map-menu-button @(NavigationMenuOpen ? "is-active" : null)" title="Apri menu" aria-label="Apri menu" aria-expanded="@NavigationMenuOpen" @onclick="ToggleNavigationMenu">☰</button>
             </div>
         </header>
 
+        @if (NavigationMenuOpen)
+        {
+            <nav class="map-navigation-menu" aria-label="Menu principale">
+                <button @onclick='() => SelectTab("map")'>Mappa</button>
+                <button @onclick='() => SelectTab("search")'>Cerca località</button>
+                <button @onclick='() => SelectTab("cadastre")'>Ricerca catastale</button>
+                <button @onclick='() => SelectTab("data")'>Dati e disegni</button>
+                <button @onclick='() => SelectTab("projects")'>Progetti</button>
+                <button @onclick='() => SelectTab("save")'>Esporta</button>
+                <button @onclick='() => SelectTab("tools")'>Strumenti avanzati</button>
+                <button @onclick='() => SelectTab("settings")'>Impostazioni</button>
+                <div class="menu-credits"><strong>LME Mappe Catastali</strong><span>Autore: Livio Merola</span><a href="mailto:info@liviomerola.net">info@liviomerola.net</a><span>Mappe: Esri, OpenStreetMap, CARTO, OpenTopoMap. Catasto: Agenzia delle Entrate CC BY 4.0.</span></div>
+            </nav>
+        }
+
         <div class="map-search @(ActiveTab == "search" ? "is-open" : null)">
             <input @bind="SearchText" @bind:event="oninput" placeholder="Localita, indirizzo o coordinate" />
             <button @onclick="SearchLocation">Vai</button>
@@ -62,7 +81,7 @@
                     <input type="checkbox" @bind="ShowSelectedParcels" @bind:after="ApplySelectedParcelsVisibility" />
                     <span>
                         <strong>Particelle catastali evidenziate</strong>
-                        <small>Contorni rossi ottenuti da ricerca o GPS</small>
+                        <small>Contorni ottenuti da ricerca o GPS</small>
                     </span>
                 </label>
                 <label class="map-layer-option">
@@ -83,6 +102,7 @@
                     <button class="danger-command" @onclick="ClearSelectedParcels">Elimina definitivamente le particelle selezionate</button>
                     <button class="danger-command" @onclick="ClearMapElements">Pulisci elementi mappa</button>
                 </div>
+                <MenuHelp Topic="layers" />
             </section>
         }
 
@@ -170,6 +190,7 @@
                             <strong>Mappa pubblica ufficiale</strong>
                             <p>I confini visualizzati arrivano dai servizi WMS/WFS open data dell'Agenzia delle Entrate e non richiedono CAPTCHA.</p>
                         </div>
+                        <MenuHelp Topic="cadastre" />
                     </section>
                 }
                 else if (ActiveTab == "data")
@@ -211,6 +232,10 @@
 
                         <section class="panel-section">
                             <h2>Disegni e misure</h2>
+                            <div class="button-row">
+                                <button class="secondary-command" @onclick="UndoMapChange">Annulla</button>
+                                <button class="secondary-command" @onclick="RedoMapChange">Ripristina</button>
+                            </div>
                             <label class="toggle-line project-save-option">
                                 <input type="checkbox" @bind="ShowDrawingMeasurements" @bind:after="ApplyDrawingMeasurementsVisibility" />
                                 <span>Mostra superficie, perimetro e lati</span>
@@ -219,6 +244,7 @@
                                 @(DrawToolsVisible ? "Nascondi strumenti sulla mappa" : "Mostra strumenti sulla mappa")
                             </button>
                             <button class="danger-command" @onclick="ClearDrawings">Elimina disegni e POI</button>
+                            <button class="secondary-command" @onclick="RestoreAutosave">Recupera ultimo autosalvataggio</button>
                         </section>
 
                         <section class="panel-section">
@@ -229,6 +255,7 @@
                             </label>
                             <button class="primary-command" @onclick="AddProjectMarker">Aggiungi POI al centro mappa</button>
                         </section>
+                        <MenuHelp Topic="data" />
                     </section>
                 }
                 else if (ActiveTab == "save")
@@ -246,9 +273,15 @@
                                     <option value="geojson">GeoJSON</option>
                                     <option value="kml">KML</option>
                                     <option value="kmz">KMZ compresso</option>
+                                    <option value="gpx">GPX per GPS</option>
+                                    <option value="pdf">Rapporto PDF</option>
                                 </select>
                             </label>
                             <div class="export-options" role="group" aria-label="Oggetti da esportare">
+                                <label class="toggle-line project-save-option">
+                                    <input type="checkbox" @bind="ExportSelectedOnly" @bind:after="SaveFlagPreferences" />
+                                    <span>Solo oggetti selezionati nel pannello Layer</span>
+                                </label>
                                 <label class="toggle-line project-save-option">
                                     <input type="checkbox" @bind="ExportImported" @bind:after="SaveFlagPreferences" />
                                     <span>Particelle e dati GIS importati</span>
@@ -259,7 +292,7 @@
                                 </label>
                                 <label class="toggle-line project-save-option">
                                     <input type="checkbox" @bind="ExportCadastral" @bind:after="SaveFlagPreferences" />
-                                    <span>Particelle catastali rosse e GPS</span>
+                                    <span>Particelle catastali evidenziate e GPS</span>
                                 </label>
                                 <label class="toggle-line project-save-option">
                                     <input type="checkbox" @bind="ExportDrawings" @bind:after="SaveFlagPreferences" />
@@ -280,6 +313,7 @@
                             <small class="field-help">KML e KMZ sono compatibili con Google Earth. Gli sfondi satellitari e il WMS non vengono incorporati nel file vettoriale.</small>
                         </section>
 
+                        <MenuHelp Topic="save" />
                     </section>
                 }
                 else if (ActiveTab == "projects")
@@ -293,7 +327,7 @@
                             </label>
                             <label class="toggle-line project-save-option">
                                 <input type="checkbox" @bind="IncludeCadastralParcels" @bind:after="SaveFlagPreferences" />
-                                <span>Includi le particelle catastali rosse</span>
+                                <span>Includi le particelle catastali evidenziate</span>
                             </label>
                             <button class="primary-command" @onclick="SaveProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(NewProjectName))">Salva progetto</button>
                         </section>
@@ -306,17 +340,55 @@
                                     <option value="">Seleziona un progetto</option>
                                     @foreach (var project in Projects)
                                     {
-                                        <option value="@project.Id">@project.Name - @project.UpdatedAt.ToLocalTime().ToString("dd/MM/yyyy HH:mm")</option>
+                                        <option value="@project.Id">@(project.IsArchived ? "[ARCHIVIATO] " : "")@(project.IsReadOnly ? "[SOLA LETTURA] " : "")@(string.IsNullOrWhiteSpace(project.Folder) ? "" : $"{project.Folder} / ")@project.Name - @project.UpdatedAt.ToLocalTime().ToString("dd/MM/yyyy HH:mm")</option>
+                                    }
+                                </select>
+                            </label>
+                            <div class="project-command-stack">
+                                <button @onclick="LoadProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Apri</button>
+                                <button class="danger-command" @onclick="DeleteProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Elimina</button>
+                            </div>
+                            <label>
+                                Cartella
+                                <input @bind="ProjectFolder" placeholder="Es. Cantieri 2026" maxlength="60" />
+                            </label>
+                            <div class="project-command-stack">
+                                <button class="secondary-command" @onclick="UpdateProjectFolder" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Sposta</button>
+                                <button class="secondary-command" @onclick="DuplicateProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Duplica</button>
+                                <button class="secondary-command" @onclick="ToggleProjectArchive" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">@(SelectedProject?.IsArchived == true ? "Ripristina" : "Archivia")</button>
+                                <button class="secondary-command" @onclick='() => ShareProject(false)' disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Condividi modificabile</button>
+                                <button class="secondary-command" @onclick='() => ShareProject(true)' disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Condividi in sola lettura</button>
+                            </div>
+                            @if (SelectedProject?.IsReadOnly == true)
+                            {
+                                <small class="field-help">Questo progetto è protetto. Usa Duplica per crearne una copia modificabile.</small>
+                            }
+                            <label>
+                                Revisione precedente
+                                <select @bind="SelectedVersionId" disabled="@(ProjectVersions.Count == 0)">
+                                    <option value="">Seleziona revisione</option>
+                                    @foreach (var version in ProjectVersions)
+                                    {
+                                        <option value="@version.Id">@version.UpdatedAt.ToLocalTime().ToString("dd/MM/yyyy HH:mm:ss")</option>
                                     }
                                 </select>
                             </label>
                             <div class="button-row">
-                                <button @onclick="LoadProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Apri</button>
+                                <button class="secondary-command" @onclick="LoadProjectVersion" disabled="@(string.IsNullOrWhiteSpace(SelectedVersionId))">Apri revisione</button>
-                                <button class="danger-command" @onclick="DeleteProject" disabled="@(ProjectBusy || string.IsNullOrWhiteSpace(SelectedProjectId))">Elimina</button>
+                                <button class="secondary-command" @onclick="CompareProjectVersion" disabled="@(string.IsNullOrWhiteSpace(SelectedVersionId))">Confronta</button>
                             </div>
                             <div class="project-archive-state">@ProjectArchiveMessage</div>
                         </section>
 
+                        <section class="panel-section">
+                            <h2>Backup e trasferimento</h2>
+                            <div class="button-row">
+                                <button class="secondary-command" @onclick="ShareFullBackup">Crea backup</button>
+                                <button class="secondary-command" @onclick="RestoreBackup">Ripristina backup</button>
+                            </div>
+                            <button class="secondary-command" @onclick="ImportProject">Importa progetto condiviso</button>
+                        </section>
+
                         <section class="panel-section">
                             <h2>Visualizzazione progetto</h2>
                             <label class="toggle-line project-save-option">
@@ -337,6 +409,39 @@
                                 <span>Mostra misure dei disegni</span>
                             </label>
                         </section>
+                        <MenuHelp Topic="projects" />
+                    </section>
+                }
+                else if (ActiveTab == "tools")
+                {
+                    <section class="panel-content">
+                        <section class="panel-section">
+                            <h2>Oggetti e coordinate</h2>
+                            <button class="primary-command" @onclick="ShowObjectTable">Apri tabella oggetti e particelle</button>
+                            <button class="secondary-command" @onclick="ShowCoordinateInspector">Coordinate WGS84 e UTM</button>
+                            <button class="secondary-command" @onclick="ShowAuditLog">Registro operazioni</button>
+                        </section>
+                        <section class="panel-section">
+                            <h2>Cestino</h2>
+                            <div class="button-row">
+                                <button class="secondary-command" @onclick="RestoreTrashItem">Ripristina ultima rimozione</button>
+                                <button class="danger-command" @onclick="EmptyTrash">Svuota cestino</button>
+                            </div>
+                        </section>
+                        <section class="panel-section">
+                            <h2>Mappe offline</h2>
+                            <label>
+                                Livelli di zoom aggiuntivi
+                                <input type="number" min="0" max="4" @bind="OfflineExtraZoomLevels" />
+                            </label>
+                            <button class="primary-command" @onclick="DownloadOfflineArea" disabled="@OfflineBusy">@(OfflineBusy ? "Download in corso..." : "Scarica area visibile")</button>
+                            <div class="button-row">
+                                <button class="secondary-command" @onclick="UseOfflineMap">Usa mappe offline</button>
+                                <button class="danger-command" @onclick="ClearOfflineArea">Svuota archivio</button>
+                            </div>
+                            <small class="field-help">@OfflineStatus</small>
+                        </section>
+                        <MenuHelp Topic="tools" />
                     </section>
                 }
                 else if (ActiveTab == "settings")
@@ -353,6 +458,7 @@
                                     <option value="topographic">Topografica - Esri World Topographic</option>
                                     <option value="terrain">Terreno - OpenTopoMap</option>
                                     <option value="carto">Strade chiare - CARTO Voyager</option>
+                                    <option value="offline">Mappe salvate offline</option>
                                     <option value="azure-road">Strade - Azure Maps</option>
                                     <option value="azure-satellite">Satellite - Azure Maps</option>
                                     <option value="google-satellite">Satellite - Google Maps</option>
@@ -383,6 +489,74 @@
                             </div>
                         </section>
 
+                        <section class="panel-section">
+                            <h2>Modifica e sicurezza dati</h2>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="AutoSaveEnabled" @bind:after="ApplyAdvancedOptions" />
+                                <span>Autosalvataggio locale dopo ogni modifica</span>
+                            </label>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="AutoSaveOpenProject" @bind:after="SaveFlagPreferences" />
+                                <span>Aggiorna automaticamente il progetto aperto</span>
+                            </label>
+                            <label>
+                                Backup automatico
+                                <select @bind="AutomaticBackupFrequency" @bind:after="SaveFlagPreferences">
+                                    <option value="off">Disattivato</option>
+                                    <option value="daily">Giornaliero</option>
+                                    <option value="weekly">Settimanale</option>
+                                </select>
+                            </label>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="SnapEnabled" @bind:after="ApplyAdvancedOptions" />
+                                <span>Aggancia i vertici agli oggetti vicini</span>
+                            </label>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="AutoFitSelectedObject" @bind:after="ApplyAdvancedOptions" />
+                                <span>Centra e zooma quando seleziono un oggetto</span>
+                            </label>
+                            <label>
+                                Distanza aggancio in pixel
+                                <input type="range" min="4" max="40" step="1" @bind="SnapDistancePixels" @bind:after="ApplyAdvancedOptions" />
+                            </label>
+                        </section>
+
+                        <section class="panel-section">
+                            <h2>Sincronizzazione WebDAV</h2>
+                            <label>
+                                Indirizzo cartella o file WebDAV
+                                <input type="url" @bind="WebDavEndpoint" placeholder="https://server/remote.php/dav/files/utente/cartella" />
+                            </label>
+                            <label>
+                                Nome utente
+                                <input @bind="WebDavUserName" autocomplete="username" />
+                            </label>
+                            <label>
+                                Password o password applicazione
+                                <input type="password" @bind="WebDavPassword" autocomplete="current-password" />
+                            </label>
+                            <button class="secondary-command" @onclick="SaveWebDavSettings">Salva configurazione</button>
+                            <div class="button-row">
+                                <button class="primary-command" @onclick="SyncUpload" disabled="@SyncBusy">Invia al cloud</button>
+                                <button class="secondary-command" @onclick="SyncDownload" disabled="@SyncBusy">Scarica dal cloud</button>
+                            </div>
+                            <small class="field-help">@SyncStatus</small>
+                        </section>
+
+                        <section class="panel-section">
+                            <h2>Aggiornamenti applicazione</h2>
+                            <button class="primary-command" @onclick="CheckForUpdates" disabled="@UpdateBusy">@(UpdateBusy ? "Controllo..." : "Controlla nuova versione")</button>
+                            @if (!string.IsNullOrWhiteSpace(UpdateDownloadUrl))
+                            {
+                                <button class="secondary-command" @onclick="OpenUpdateDownload">Scarica aggiornamento</button>
+                            }
+                            <small class="field-help">@UpdateStatus</small>
+                            @if (!string.IsNullOrWhiteSpace(UpdateReleaseNotes))
+                            {
+                                <pre class="release-notes">@UpdateReleaseNotes</pre>
+                            }
+                        </section>
+
                         <section class="panel-section">
                             <h2>GPS e percorso</h2>
                             <label class="toggle-line project-save-option">
@@ -393,6 +567,19 @@
                                 <input type="checkbox" @bind="TrailEnabled" @bind:after="ApplyTrailOption" />
                                 <span>Registra la traccia mentre cammini</span>
                             </label>
+                            <div class="button-row">
+                                <button class="secondary-command" @onclick="ShowTrailStats">Riepilogo traccia</button>
+                                <button class="danger-command" @onclick="ClearGpsTrail">Elimina traccia</button>
+                            </div>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="GpsProximityEnabled" @bind:after="ApplyAdvancedOptions" />
+                                <span>Distanza e direzione dal bordo selezionato</span>
+                            </label>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" @bind="GpsBoundaryAlertEnabled" @bind:after="ApplyAdvancedOptions" />
+                                <span>Avvisa quando entro o esco dall'area selezionata</span>
+                            </label>
+                            <button class="secondary-command" @onclick="SaveGpsMeasurementPoint">Salva punto GPS con precisione e ora</button>
                         </section>
 
                         <section class="panel-section">
@@ -406,6 +593,7 @@
                             <button class="secondary-command" @onclick="ExportCadastralImage">Mostra vista WMS corrente</button>
                             <footer>Dati catastali: Agenzia delle Entrate, licenza CC BY 4.0. App indipendente.</footer>
                         </section>
+                        <MenuHelp Topic="settings" />
                     </section>
                 }
             </aside>
@@ -432,14 +620,6 @@
             </section>
         </div>
 
-        <nav class="bottom-tabs" aria-label="Sezioni principali">
-            <button class="@(ActiveTab == "map" || ActiveTab == "search" ? "active" : null)" @onclick='() => SelectTab("map")'>Mappa</button>
-            <button class="@(ActiveTab == "cadastre" ? "active" : null)" @onclick='() => SelectTab("cadastre")'>Catasto</button>
-            <button class="@(ActiveTab == "data" ? "active" : null)" @onclick='() => SelectTab("data")'>Dati</button>
-            <button class="@(ActiveTab == "projects" ? "active" : null)" @onclick='() => SelectTab("projects")'>Progetti</button>
-            <button class="@(ActiveTab == "save" ? "active" : null)" @onclick='() => SelectTab("save")'>Salvataggio</button>
-            <button class="@(ActiveTab == "settings" ? "active" : null)" @onclick='() => SelectTab("settings")'>Impostazioni</button>
-        </nav>
     </section>
 </div>
 
@@ -453,6 +633,8 @@
     private string PoiName { get; set; } = string.Empty;
     private string SelectedProjectId { get; set; } = string.Empty;
     private string ProjectArchiveMessage { get; set; } = "Nessun progetto salvato.";
+    private string ProjectFolder { get; set; } = string.Empty;
+    private string SelectedVersionId { get; set; } = string.Empty;
     private string Status { get; set; } = "online";
     private string SelectedBaseLayer { get; set; } = "satellite";
     private string GoogleMapsApiKey { get; set; } = string.Empty;
@@ -472,6 +654,9 @@
     private bool DrawToolsVisible { get; set; }
     private bool TrailEnabled { get; set; }
     private bool LayerPanelOpen { get; set; }
+    private bool NavigationMenuOpen { get; set; }
+    private bool HasUnsavedChanges { get; set; }
+    private DotNetObjectReference<Home>? MapCallbackReference { get; set; }
     private bool IncludeCadastralParcels { get; set; } = true;
     private bool IncludeKmlSheetLayer { get; set; }
     private bool ShowImportedSheetLayer { get; set; }
@@ -485,8 +670,30 @@
     private bool ExportDrawings { get; set; } = true;
     private bool ExportPoi { get; set; } = true;
     private bool ExportTrail { get; set; } = true;
+    private bool ExportSelectedOnly { get; set; }
+    private bool AutoSaveEnabled { get; set; } = true;
+    private bool AutoSaveOpenProject { get; set; }
+    private string AutomaticBackupFrequency { get; set; } = "daily";
+    private bool SnapEnabled { get; set; } = true;
+    private bool AutoFitSelectedObject { get; set; }
+    private int SnapDistancePixels { get; set; } = 14;
+    private bool GpsProximityEnabled { get; set; } = true;
+    private bool GpsBoundaryAlertEnabled { get; set; }
+    private int OfflineExtraZoomLevels { get; set; } = 2;
+    private bool OfflineBusy { get; set; }
+    private string OfflineStatus { get; set; } = "Nessuna area verificata.";
+    private string WebDavEndpoint { get; set; } = string.Empty;
+    private string WebDavUserName { get; set; } = string.Empty;
+    private string WebDavPassword { get; set; } = string.Empty;
+    private bool SyncBusy { get; set; }
+    private string SyncStatus { get; set; } = "Sincronizzazione non configurata.";
+    private bool UpdateBusy { get; set; }
+    private string UpdateStatus { get; set; } = $"Versione installata: {AppUpdateService.CurrentVersion}";
+    private string UpdateDownloadUrl { get; set; } = string.Empty;
+    private string UpdateReleaseNotes { get; set; } = string.Empty;
     private CancellationTokenSource? CatalogCancellation { get; set; }
     private CancellationTokenSource? GpsLookupCancellation { get; set; }
+    private CancellationTokenSource? ProjectAutoSaveCancellation { get; set; }
     private long LastGpsLookupAt;
     private int GpsLookupInProgress;
 
@@ -495,6 +702,8 @@
     private IReadOnlyList<string> Sheets { get; set; } = [];
     private IReadOnlyList<ParcelOption> Parcels { get; set; } = [];
     private IReadOnlyList<MapProjectSummary> Projects { get; set; } = [];
+    private IReadOnlyList<MapProjectVersion> ProjectVersions { get; set; } = [];
+    private MapProjectSummary? SelectedProject => Projects.FirstOrDefault(item => item.Id == SelectedProjectId);
 
     private MunicipalityOption? SelectedMunicipality =>
         Municipalities.FirstOrDefault(item => item.Code == SelectedMunicipalityCode);
@@ -508,6 +717,7 @@
         "data" => "Dati e disegni",
         "projects" => "Archivio progetti",
         "save" => "Salvataggio ed esportazione",
+        "tools" => "Strumenti avanzati",
         "settings" => "Impostazioni",
         _ => string.Empty
     };
@@ -518,6 +728,7 @@
         "data" => "File GIS, misure e POI",
         "projects" => "Salva, apri e visualizza i tuoi lavori",
         "save" => "Esporta file GIS",
+        "tools" => "Oggetti, geometrie, coordinate e offline",
         "settings" => "Mappa, GPS e servizi ufficiali",
         _ => string.Empty
     };
@@ -554,6 +765,11 @@
             AzureMapsSubscriptionKey = string.Empty;
         }
 
+        WebDavEndpoint = Preferences.Default.Get("webdav_endpoint", string.Empty);
+        WebDavUserName = Preferences.Default.Get("webdav_username", string.Empty);
+        try { WebDavPassword = await SecureStorage.Default.GetAsync("webdav_password") ?? string.Empty; }
+        catch { WebDavPassword = string.Empty; }
+
         try
         {
             Regions = await CatalogService.GetRegionsAsync();
@@ -570,10 +786,15 @@
     {
         if (firstRender)
         {
-            await JS.InvokeVoidAsync("lmeMap.init");
+            MapCallbackReference = DotNetObjectReference.Create(this);
+            await JS.InvokeVoidAsync("lmeMap.init", MapCallbackReference);
             await ApplyFlagPreferencesToMapAsync();
+            await ApplyAdvancedOptions();
             await CenterOnInitialLocationAsync();
             await MigrateLegacyProjectAsync();
+            var offlineCount = await JS.InvokeAsync<int>("lmeMap.getOfflineTileStats");
+            OfflineStatus = offlineCount == 0 ? "Nessuna tessera salvata." : $"{offlineCount} tessere disponibili offline.";
+            await InvokeAsync(StateHasChanged);
         }
     }
 
@@ -693,6 +914,7 @@
 
     private async Task SelectTab(string tab)
     {
+        NavigationMenuOpen = false;
         ActiveTab = tab;
         if (tab != "map")
         {
@@ -710,6 +932,12 @@
         }
     }
 
+    private void ToggleNavigationMenu()
+    {
+        NavigationMenuOpen = !NavigationMenuOpen;
+        if (NavigationMenuOpen) LayerPanelOpen = false;
+    }
+
     private async Task ToggleLayerPanel()
     {
         LayerPanelOpen = !LayerPanelOpen;
@@ -872,8 +1100,16 @@
             var label = $"{municipality.Name} - foglio {DisplaySheet(SelectedSheet)}, particella {parcel.Number}";
             CatalogBusy = true;
             CatalogMessage = "Scarico il confine dal servizio ufficiale AdE...";
-            var xml = await OfficialCadastreService.GetParcelsNearAsync(parcel.Latitude, parcel.Longitude, 8);
+            ShowSelectedParcels = true;
-            await JS.InvokeVoidAsync("lmeMap.displayOfficialParcel", xml, parcel.Latitude, parcel.Longitude, parcel.Number, label, true);
+            SaveFlagPreferences();
+            await JS.InvokeVoidAsync("lmeMap.setSelectedParcelsVisible", true);
+            var xml = await OfficialCadastreService.GetParcelsNearAsync(parcel.Latitude, parcel.Longitude, 30);
+            var displayResult = await JS.InvokeAsync<string>("lmeMap.displayOfficialParcel", xml, parcel.Latitude, parcel.Longitude, parcel.Number, label, true);
+            if (displayResult == "imported")
+            {
+                ShowImportedData = true;
+                SaveFlagPreferences();
+            }
             ActiveTab = "map";
             await Task.Delay(30);
             await JS.InvokeVoidAsync("lmeMap.resize");
@@ -1047,6 +1283,61 @@
         await JS.InvokeVoidAsync("lmeMap.setDrawingMeasurementsVisible", ShowDrawingMeasurements);
     }
 
+    [JSInvokable]
+    public Task SetMeasurementsFromLayerManager(string category, bool enabled)
+    {
+        if (category == "imported")
+        {
+            ShowImportedMeasurements = enabled;
+        }
+        else if (category == "drawings")
+        {
+            ShowDrawingMeasurements = enabled;
+        }
+        SaveFlagPreferences();
+        return InvokeAsync(StateHasChanged);
+    }
+
+    [JSInvokable]
+    public Task OnMapChanged(string action)
+    {
+        HasUnsavedChanges = true;
+        if (AutoSaveOpenProject && SelectedProject is { IsReadOnly: false })
+        {
+            ProjectAutoSaveCancellation?.Cancel();
+            ProjectAutoSaveCancellation?.Dispose();
+            ProjectAutoSaveCancellation = new CancellationTokenSource();
+            _ = AutoSaveCurrentProjectAsync(ProjectAutoSaveCancellation.Token);
+        }
+        return InvokeAsync(StateHasChanged);
+    }
+
+    [JSInvokable]
+    public Task OnProjectSaved()
+    {
+        HasUnsavedChanges = false;
+        return InvokeAsync(StateHasChanged);
+    }
+
+    private async Task AutoSaveCurrentProjectAsync(CancellationToken cancellationToken)
+    {
+        try
+        {
+            await Task.Delay(TimeSpan.FromSeconds(3), cancellationToken);
+            var project = SelectedProject;
+            if (project is null || project.IsReadOnly) return;
+            var snapshot = await JS.InvokeAsync<string>("lmeMap.createProjectSnapshot", IncludeCadastralParcels);
+            await ProjectStorageService.SaveAsync(project.Name, snapshot, IncludeCadastralParcels, project.Id);
+            await JS.InvokeVoidAsync("lmeMap.markProjectSaved");
+            await RefreshProjectsAsync();
+        }
+        catch (OperationCanceledException) { }
+        catch (Exception error)
+        {
+            await JS.InvokeVoidAsync("lmeMap.showInfo", $"Autosalvataggio progetto non riuscito: {error.GetBaseException().Message}");
+        }
+    }
+
     private async Task ToggleDrawTools()
     {
         DrawToolsVisible = !DrawToolsVisible;
@@ -1080,10 +1371,113 @@
         }
     }
 
-    private Task SelectProject(ChangeEventArgs args)
+    private async Task SelectProject(ChangeEventArgs args)
     {
         SelectedProjectId = args.Value?.ToString() ?? string.Empty;
-        return Task.CompletedTask;
+        ProjectFolder = SelectedProject?.Folder ?? string.Empty;
+        SelectedVersionId = string.Empty;
+        ProjectVersions = string.IsNullOrWhiteSpace(SelectedProjectId)
+            ? []
+            : await ProjectStorageService.GetVersionsAsync(SelectedProjectId);
+    }
+
+    private Task UndoMapChange() => JS.InvokeVoidAsync("lmeMap.undoMapChange").AsTask();
+    private Task RedoMapChange() => JS.InvokeVoidAsync("lmeMap.redoMapChange").AsTask();
+    private Task RestoreAutosave() => JS.InvokeVoidAsync("lmeMap.restoreAutosave").AsTask();
+    private Task SaveGpsMeasurementPoint() => JS.InvokeVoidAsync("lmeMap.saveGpsMeasurementPoint").AsTask();
+    private async Task ShowTrailStats()
+    {
+        var stats = await JS.InvokeAsync<TrailStats>("lmeMap.getGpsTrailStats");
+        var duration = TimeSpan.FromSeconds(stats.DurationSeconds);
+        await JS.InvokeVoidAsync("lmeMap.showInfo", $"Traccia: {stats.Points} punti, {stats.Length:0} m, durata {duration:hh\\:mm\\:ss}, {(stats.Recording ? "in registrazione" : "in pausa")}.");
+    }
+    private Task ClearGpsTrail() => JS.InvokeVoidAsync("lmeMap.clearGpsTrail").AsTask();
+
+    private async Task DuplicateProject()
+    {
+        if (SelectedProject is null) return;
+        var copy = await ProjectStorageService.DuplicateAsync(SelectedProject.Id);
+        await RefreshProjectsAsync();
+        SelectedProjectId = copy.Id;
+        ProjectFolder = copy.Folder;
+        await JS.InvokeVoidAsync("lmeMap.showInfo", $"Progetto duplicato: {copy.Name}.");
+    }
+
+    private async Task UpdateProjectFolder()
+    {
+        if (SelectedProject is null) return;
+        await ProjectStorageService.UpdateOrganizationAsync(SelectedProject.Id, ProjectFolder);
+        await RefreshProjectsAsync();
+        await JS.InvokeVoidAsync("lmeMap.showInfo", "Cartella del progetto aggiornata.");
+    }
+
+    private async Task ToggleProjectArchive()
+    {
+        if (SelectedProject is not { } project) return;
+        await ProjectStorageService.UpdateOrganizationAsync(project.Id, isArchived: !project.IsArchived);
+        await RefreshProjectsAsync();
+        await JS.InvokeVoidAsync("lmeMap.showInfo", project.IsArchived ? "Progetto ripristinato." : "Progetto archiviato.");
+    }
+
+    private async Task ShareProject(bool readOnly)
+    {
+        if (SelectedProject is null) return;
+        var path = await ProjectStorageService.CreateProjectPackageAsync(SelectedProject.Id, readOnly);
+        await Share.Default.RequestAsync(new ShareFileRequest { Title = readOnly ? "Condividi progetto LME in sola lettura" : "Condividi progetto LME modificabile", File = new ShareFile(path, "application/json") });
+    }
+
+    private async Task ShareFullBackup()
+    {
+        var path = await ProjectStorageService.CreateBackupAsync();
+        await Share.Default.RequestAsync(new ShareFileRequest { Title = "Backup completo LME Mappe Catastali", File = new ShareFile(path, "application/zip") });
+    }
+
+    private async Task RestoreBackup()
+    {
+        var file = await FilePicker.Default.PickAsync(new PickOptions { PickerTitle = "Scegli backup LME" });
+        if (file is null) return;
+        var path = await CopyPickedFileToCacheAsync(file);
+        var count = await ProjectStorageService.RestoreBackupAsync(path);
+        await RefreshProjectsAsync();
+        await JS.InvokeVoidAsync("lmeMap.showInfo", $"Backup ripristinato: {count} progetti disponibili.");
+    }
+
+    private async Task ImportProject()
+    {
+        var file = await FilePicker.Default.PickAsync(new PickOptions { PickerTitle = "Scegli progetto LME" });
+        if (file is null) return;
+        var path = await CopyPickedFileToCacheAsync(file);
+        var imported = await ProjectStorageService.ImportProjectAsync(path);
+        await RefreshProjectsAsync();
+        SelectedProjectId = imported.Id;
+        await JS.InvokeVoidAsync("lmeMap.showInfo", $"Progetto importato: {imported.Name}.");
+    }
+
+    private static async Task<string> CopyPickedFileToCacheAsync(FileResult file)
+    {
+        var path = Path.Combine(FileSystem.CacheDirectory, $"{Guid.NewGuid():N}-{file.FileName}");
+        await using var input = await file.OpenReadAsync();
+        await using var output = File.Create(path);
+        await input.CopyToAsync(output);
+        return path;
+    }
+
+    private async Task LoadProjectVersion()
+    {
+        if (SelectedProject is null || string.IsNullOrWhiteSpace(SelectedVersionId)) return;
+        if (!await JS.InvokeAsync<bool>("lmeMap.confirmDiscardChanges", "aprire la revisione")) return;
+        var snapshot = await ProjectStorageService.LoadVersionAsync(SelectedProject.Id, SelectedVersionId);
+        var options = await JS.InvokeAsync<ProjectDisplayOptions>("lmeMap.loadProjectSnapshot", snapshot, $"{SelectedProject.Name} - revisione");
+        ApplyProjectDisplayOptions(options);
+        ActiveTab = "map";
+    }
+
+    private async Task CompareProjectVersion()
+    {
+        if (SelectedProject is null || string.IsNullOrWhiteSpace(SelectedVersionId)) return;
+        var current = await ProjectStorageService.LoadAsync(SelectedProject.Id);
+        var previous = await ProjectStorageService.LoadVersionAsync(SelectedProject.Id, SelectedVersionId);
+        ProjectArchiveMessage = await JS.InvokeAsync<string>("lmeMap.compareProjectSnapshots", current, previous);
     }
 
     private async Task ExportMapFile()
@@ -1105,7 +1499,8 @@
                 includeCadastral = ExportCadastral,
                 includeDrawings = ExportDrawings,
                 includePoi = ExportPoi,
-                includeTrail = ExportTrail
+                includeTrail = ExportTrail,
+                selectedOnly = ExportSelectedOnly
             });
             var exported = await MapExportService.CreateAsync(ExportFileName, ExportFormat, geoJson);
             await Share.Default.RequestAsync(new ShareFileRequest
@@ -1156,11 +1551,15 @@
             await RefreshProjectsAsync();
             SelectedProjectId = saved.Id;
             NewProjectName = saved.Name;
+            await JS.InvokeVoidAsync("lmeMap.setProjectReadOnly", false);
+            await JS.InvokeVoidAsync("lmeMap.markProjectSaved");
+            HasUnsavedChanges = false;
+            await CreateAutomaticBackupIfDue();
             await JS.InvokeVoidAsync(
                 "lmeMap.showInfo",
                 IncludeCadastralParcels
-                    ? $"Progetto salvato: {saved.Name}, incluse le particelle rosse."
+                    ? $"Progetto salvato: {saved.Name}, incluse le particelle catastali evidenziate."
-                    : $"Progetto salvato: {saved.Name}, senza particelle rosse.");
+                    : $"Progetto salvato: {saved.Name}, senza particelle catastali evidenziate.");
         }
         catch (Exception error)
         {
@@ -1180,6 +1579,7 @@
             await JS.InvokeVoidAsync("lmeMap.showInfo", "Seleziona il progetto da caricare.");
             return;
         }
+        if (!await JS.InvokeAsync<bool>("lmeMap.confirmDiscardChanges", "aprire un altro progetto")) return;
 
         ProjectBusy = true;
         try
@@ -1191,6 +1591,9 @@
             NewProjectName = project.Name;
             ExportFileName = project.Name;
             IncludeCadastralParcels = project.IncludesCadastralParcels;
+            await JS.InvokeVoidAsync("lmeMap.setProjectReadOnly", project.IsReadOnly);
+            await JS.InvokeVoidAsync("lmeMap.markProjectSaved");
+            HasUnsavedChanges = false;
             ActiveTab = "map";
             await Task.Delay(30);
             await JS.InvokeVoidAsync("lmeMap.resize");
@@ -1256,6 +1659,115 @@
             ProjectBusy = false;
         }
     }
+
+    private Task ShowObjectTable() => JS.InvokeVoidAsync("lmeMap.showObjectTable").AsTask();
+    private Task ShowAuditLog() => JS.InvokeVoidAsync("lmeMap.showAuditLog").AsTask();
+    private Task ShowCoordinateInspector() => JS.InvokeVoidAsync("lmeMap.showCoordinateInspector").AsTask();
+    private Task ValidateSelectedGeometries() => JS.InvokeVoidAsync("lmeMap.validateAndRepairSelected").AsTask();
+    private Task CreateSelectedHole() => JS.InvokeVoidAsync("lmeMap.createHoleFromSelected").AsTask();
+    private Task CompareSelectedGeometries() => JS.InvokeVoidAsync("lmeMap.compareSelectedGeometries").AsTask();
+    private Task RestoreTrashItem() => JS.InvokeVoidAsync("lmeMap.restoreLastTrashItem").AsTask();
+    private Task EmptyTrash() => JS.InvokeVoidAsync("lmeMap.emptyTrash").AsTask();
+
+    private async Task DownloadOfflineArea()
+    {
+        OfflineBusy = true;
+        try
+        {
+            var result = await JS.InvokeAsync<OfflineDownloadResult>("lmeMap.downloadOfflineArea", OfflineExtraZoomLevels);
+            OfflineStatus = $"{result.Saved} tessere disponibili, zoom {result.StartZoom}-{result.EndZoom}.";
+        }
+        catch (Exception error) { OfflineStatus = $"Download non riuscito: {error.GetBaseException().Message}"; }
+        finally { OfflineBusy = false; }
+    }
+
+    private async Task UseOfflineMap()
+    {
+        await JS.InvokeVoidAsync("lmeMap.setBaseLayer", "offline");
+        SelectedBaseLayer = "offline";
+    }
+
+    private async Task ClearOfflineArea()
+    {
+        if (!await JS.InvokeAsync<bool>("confirm", "Svuotare tutte le mappe salvate offline?")) return;
+        await JS.InvokeVoidAsync("lmeMap.clearOfflineTiles");
+        OfflineStatus = "Nessuna tessera salvata.";
+    }
+
+    private async Task SaveWebDavSettings()
+    {
+        Preferences.Default.Set("webdav_endpoint", WebDavEndpoint.Trim());
+        Preferences.Default.Set("webdav_username", WebDavUserName.Trim());
+        if (string.IsNullOrWhiteSpace(WebDavPassword)) SecureStorage.Default.Remove("webdav_password");
+        else await SecureStorage.Default.SetAsync("webdav_password", WebDavPassword);
+        SyncStatus = "Configurazione WebDAV salvata sul dispositivo.";
+    }
+
+    private async Task SyncUpload()
+    {
+        SyncBusy = true;
+        try
+        {
+            await SaveWebDavSettings();
+            var backup = await ProjectStorageService.CreateBackupAsync();
+            await CloudSyncService.UploadAsync(WebDavEndpoint, WebDavUserName, WebDavPassword, backup);
+            SyncStatus = $"Archivio inviato al cloud il {DateTime.Now:dd/MM/yyyy HH:mm}.";
+        }
+        catch (Exception error) { SyncStatus = $"Invio non riuscito: {error.GetBaseException().Message}"; }
+        finally { SyncBusy = false; }
+    }
+
+    private async Task SyncDownload()
+    {
+        if (!await JS.InvokeAsync<bool>("lmeMap.confirmDiscardChanges", "ripristinare l'archivio cloud")) return;
+        SyncBusy = true;
+        try
+        {
+            await SaveWebDavSettings();
+            var backup = await CloudSyncService.DownloadAsync(WebDavEndpoint, WebDavUserName, WebDavPassword);
+            var count = await ProjectStorageService.RestoreBackupAsync(backup);
+            await RefreshProjectsAsync();
+            SyncStatus = $"Sincronizzazione completata: {count} progetti ripristinati.";
+        }
+        catch (Exception error) { SyncStatus = $"Download non riuscito: {error.GetBaseException().Message}"; }
+        finally { SyncBusy = false; }
+    }
+
+    private async Task CheckForUpdates()
+    {
+        UpdateBusy = true;
+        UpdateDownloadUrl = string.Empty;
+        UpdateReleaseNotes = string.Empty;
+        try
+        {
+            var update = await AppUpdateService.CheckAsync();
+            UpdateReleaseNotes = update.ReleaseNotes;
+            if (update.IsAvailable)
+            {
+                UpdateStatus = $"Installata {AppUpdateService.CurrentVersion}. Disponibile {update.Version}.";
+                UpdateDownloadUrl = update.DownloadUrl;
+            }
+            else UpdateStatus = $"Versione {AppUpdateService.CurrentVersion} aggiornata. Ultima release Gitea: {update.Version}.";
+        }
+        catch (Exception error) { UpdateStatus = $"Controllo non riuscito: {error.GetBaseException().Message}"; }
+        finally { UpdateBusy = false; }
+    }
+
+    private Task OpenUpdateDownload() => string.IsNullOrWhiteSpace(UpdateDownloadUrl)
+        ? Task.CompletedTask
+        : Launcher.Default.OpenAsync(new Uri(UpdateDownloadUrl));
+
+    private async Task CreateAutomaticBackupIfDue()
+    {
+        if (AutomaticBackupFrequency == "off") return;
+        var latest = ProjectStorageService.GetLatestScheduledBackupTime();
+        var interval = AutomaticBackupFrequency == "weekly" ? TimeSpan.FromDays(7) : TimeSpan.FromDays(1);
+        if (latest is null || DateTimeOffset.UtcNow - latest.Value.ToUniversalTime() >= interval)
+        {
+            await ProjectStorageService.CreateScheduledBackupAsync();
+        }
+    }
+
     private Task CenterOnGps() => JS.InvokeVoidAsync("lmeMap.centerOnGps").AsTask();
     private async Task ApplyTrailOption()
     {
@@ -1386,6 +1898,16 @@
         ExportDrawings = GetFlagPreference("export_drawings", true);
         ExportPoi = GetFlagPreference("export_poi", true);
         ExportTrail = GetFlagPreference("export_trail", true);
+        ExportSelectedOnly = GetFlagPreference("export_selected_only", false);
+        AutoSaveEnabled = GetFlagPreference("auto_save", true);
+        AutoSaveOpenProject = GetFlagPreference("auto_save_project", false);
+        AutomaticBackupFrequency = Preferences.Default.Get($"{FlagPreferencePrefix}backup_frequency", "daily");
+        SnapEnabled = GetFlagPreference("snap_enabled", true);
+        AutoFitSelectedObject = GetFlagPreference("auto_fit_selected_object", false);
+        SnapDistancePixels = Preferences.Default.Get($"{FlagPreferencePrefix}snap_distance", 14);
+        OfflineExtraZoomLevels = Preferences.Default.Get($"{FlagPreferencePrefix}offline_zoom_levels", 2);
+        GpsProximityEnabled = GetFlagPreference("gps_proximity", true);
+        GpsBoundaryAlertEnabled = GetFlagPreference("gps_boundary_alert", false);
 
         foreach (var layer in CadastralLayers)
         {
@@ -1411,6 +1933,16 @@
         SetFlagPreference("export_drawings", ExportDrawings);
         SetFlagPreference("export_poi", ExportPoi);
         SetFlagPreference("export_trail", ExportTrail);
+        SetFlagPreference("export_selected_only", ExportSelectedOnly);
+        SetFlagPreference("auto_save", AutoSaveEnabled);
+        SetFlagPreference("auto_save_project", AutoSaveOpenProject);
+        Preferences.Default.Set($"{FlagPreferencePrefix}backup_frequency", AutomaticBackupFrequency);
+        SetFlagPreference("snap_enabled", SnapEnabled);
+        SetFlagPreference("auto_fit_selected_object", AutoFitSelectedObject);
+        Preferences.Default.Set($"{FlagPreferencePrefix}snap_distance", SnapDistancePixels);
+        Preferences.Default.Set($"{FlagPreferencePrefix}offline_zoom_levels", OfflineExtraZoomLevels);
+        SetFlagPreference("gps_proximity", GpsProximityEnabled);
+        SetFlagPreference("gps_boundary_alert", GpsBoundaryAlertEnabled);
 
         foreach (var layer in CadastralLayers)
         {
@@ -1436,6 +1968,20 @@
         }
     }
 
+    private async Task ApplyAdvancedOptions()
+    {
+        SaveFlagPreferences();
+        await JS.InvokeVoidAsync("lmeMap.setAdvancedOptions", new
+        {
+            autoSaveEnabled = AutoSaveEnabled,
+            snapEnabled = SnapEnabled,
+            autoFitSelectedObject = AutoFitSelectedObject,
+            snapDistancePixels = SnapDistancePixels,
+            gpsProximityEnabled = GpsProximityEnabled,
+            gpsBoundaryAlertEnabled = GpsBoundaryAlertEnabled
+        });
+    }
+
     private static bool GetFlagPreference(string name, bool defaultValue) =>
         Preferences.Default.Get($"{FlagPreferencePrefix}{name}", defaultValue);
 
@@ -1497,12 +2043,31 @@
         public bool TrailEnabled { get; init; }
     }
 
+    private sealed class OfflineDownloadResult
+    {
+        public int Saved { get; init; }
+        public int Requested { get; init; }
+        public int StartZoom { get; init; }
+        public int EndZoom { get; init; }
+    }
+
+    private sealed class TrailStats
+    {
+        public int Points { get; init; }
+        public double Length { get; init; }
+        public int DurationSeconds { get; init; }
+        public bool Recording { get; init; }
+    }
+
     public ValueTask DisposeAsync()
     {
         CancelCatalogWork();
         LocationService.StopTracking();
         GpsLookupCancellation?.Cancel();
         GpsLookupCancellation?.Dispose();
+        ProjectAutoSaveCancellation?.Cancel();
+        ProjectAutoSaveCancellation?.Dispose();
+        MapCallbackReference?.Dispose();
         return ValueTask.CompletedTask;
     }
 }

LMEMappeCatastaliApp.csproj

@@ -28,8 +28,9 @@
         <ApplicationId>com.companyname.lmemappecatastaliapp</ApplicationId>
 
         <!-- Versions -->
-        <ApplicationDisplayVersion>0.2.20</ApplicationDisplayVersion>
+        <ApplicationDisplayVersion>0.4.4</ApplicationDisplayVersion>
-        <ApplicationVersion>24</ApplicationVersion>
+        <ApplicationVersion>39</ApplicationVersion>
+        <Version>$(ApplicationDisplayVersion)</Version>
 
         <!-- To develop, package, and publish an app to the Microsoft Store, see: https://aka.ms/MauiTemplateUnpackaged -->
         <WindowsPackageType>None</WindowsPackageType>

MauiProgram.cs

@@ -24,6 +24,8 @@ public static class MauiProgram
         builder.Services.AddSingleton<AzureMapsService>();
         builder.Services.AddSingleton<ProjectStorageService>();
         builder.Services.AddSingleton<MapExportService>();
+        builder.Services.AddSingleton<CloudSyncService>();
+        builder.Services.AddSingleton<AppUpdateService>();
 
 #if DEBUG
         builder.Services.AddBlazorWebViewDeveloperTools();

README.md

@@ -2,7 +2,62 @@
 
 App .NET MAUI Blazor Hybrid per Android, iOS, Mac Catalyst e Windows, pensata per consultare mappe catastali e lavorare sul campo con GPS.
 
-## Funzioni gia implementate
+## Versione 0.4.4
+
+- I comandi `Rinomina`, `Sposta nel gruppo` e `Rimuovi` occupano una riga completa e restano visibili anche nei pannelli Layer molto stretti.
+- `Sposta nel gruppo` e disponibile per padri e figli di disegni, dati importati, cornici, fogli importati e particelle evidenziate dalla ricerca catastale.
+- Editor distinti per linea e riempimento su gruppi e singoli oggetti, con contagocce dove supportato e valori modificabili HEX, RGB e HSL.
+- Copia HEX per riutilizzare esattamente un colore su altri oggetti; stili conservati nei progetti e negli export.
+- Rimossi dai menu i riferimenti al colore rosso fisso delle particelle catastali.
+- Nei progetti in sola lettura anche il trasferimento tra gruppi viene correttamente disabilitato.
+
+## Versione 0.4.3
+
+- `Mostra particella sulla mappa` riattiva sempre il layer dei confini rossi e lo porta in primo piano.
+- Una particella gia evidenziata o temporaneamente nascosta viene recuperata senza creare duplicati.
+- Deduplicazione estesa alle particelle presenti in progetti e file GeoJSON, KML e KMZ, tramite riferimenti catastali o confronto geometrico.
+- Ricerca WFS ampliata per rendere piu affidabile il recupero dei confini di particelle estese o irregolari.
+- Guida rapida collassabile in fondo a Layer e a ogni pannello operativo, con istruzioni specifiche per le relative funzioni.
+
+## Versione 0.4.2
+
+- Nuovo comando `Sposta nel gruppo` visibile accanto a Rinomina e Rimuovi per padri, sottogruppi e singoli oggetti.
+- Scelta della categoria e del sottogruppo di destinazione, con possibilita di creare un nuovo gruppo.
+- I disegni possono essere organizzati in sottogruppi come i dati importati.
+- `Sposta geometria` resta separato e continua a traslare gli oggetti in metri verso nord, sud, est o ovest.
+
+## Versione 0.4.1
+
+- Pannelli operativi allineati a destra, con ricerca lasciata nella posizione precedente.
+- Espansione della gerarchia Layer esclusivamente tramite freccia accanto alla maniglia di trascinamento.
+- Colori coerenti tra gruppo padre e figli, intensita progressiva per livello e conteggio figli in grassetto.
+- Spostamento dei gruppi tra `Disegni e POI` e `Progetti e dati importati`.
+- Rinomine persistenti nei progetti e negli export GeoJSON, KML e KMZ.
+- Gli oggetti e i gruppi rimossi dal progetto non vengono piu inclusi nei salvataggi e negli export.
+- Editor interni per rinomina, attributi multilinea, coordinate, spostamento e buffer.
+- Selezione multipla e blocco disponibili anche nella tabella oggetti e particelle.
+- Evidenziazione nel Layer dell'oggetto selezionato sulla mappa e centratura automatica opzionale, disattivata per impostazione predefinita.
+- Strumenti controllo/riparazione, foro e confronto nella barra Leaflet, con risultati visibili in una finestra dedicata.
+- Comandi del pannello Progetti disposti verticalmente senza scorrimento orizzontale.
+
+## Versione 0.4.0
+
+La mappa ora occupa tutta la schermata: il pannello `Layer` resta subito accessibile, mentre ricerca, catasto, dati, progetti, esportazione, strumenti avanzati e impostazioni sono raccolti nel menu in alto.
+
+Tra le funzioni principali della versione 0.4.0:
+
+- rinomina, ordinamento, selezione, blocco e rimozione reversibile di singoli oggetti e gruppi;
+- evidenziazione coordinata dei gruppi e gerarchia visiva tra padri, figli e livelli annidati;
+- annulla/ripristina, cestino, storico modifiche, autosalvataggio e backup programmati;
+- modifica o eliminazione del solo disegno selezionato oppure di tutti i disegni;
+- tabella oggetti, ricerca, attributi personalizzati, etichette, note e foto;
+- strumenti geometrici per buffer, unione, divisione, fori, confronto e controllo/riparazione;
+- importazione controllata di GeoJSON, KML e KMZ con analisi, pulizia e deduplicazione;
+- cache cartografica offline, sincronizzazione WebDAV e condivisione di progetti modificabili o in sola lettura;
+- controllo aggiornamenti da Gitea con versione installata, versione disponibile, note e download APK;
+- esportazione PDF con schema vettoriale, freccia nord, scala grafica e riferimenti catastali.
+
+## Funzioni implementate
 
 - Mappa interattiva Leaflet con sfondi Esri, OpenStreetMap, OpenTopoMap, CARTO Voyager, Google Maps e Azure Maps configurabili tramite chiave.
 - Layer WMS ufficiale Agenzia delle Entrate: particelle, numeri particella, fogli, fabbricati, strade e acque.
@@ -14,11 +69,11 @@ App .NET MAUI Blazor Hybrid per Android, iOS, Mac Catalyst e Windows, pensata pe
 - Migrazione automatica dei vecchi progetti: i GroundOverlay `DOC_...` salvati in precedenza insieme alle particelle vengono riconosciuti, separati e nascosti in tempo reale dal relativo check.
 - Inquadramento e pulizia dei layer importati.
 - Disegno di marker, linee, poligoni e rettangoli.
-- Area, Distanza e Cerchio disponibili nella barra Leaflet laterale, nascosta all'avvio e controllata dal pulsante nel tab Dati insieme agli altri strumenti.
+- Area, Distanza e Cerchio disponibili nella barra Leaflet laterale, nascosta all'avvio e controllata dalla sezione `Dati e disegni` insieme agli altri strumenti.
 - Misure permanenti attivabili anche sui layer importati da KML, KMZ e GeoJSON.
 - Toolbar di disegno completa di icone, modifica, eliminazione singola e pulizia di tutti i disegni/POI.
 - Archivio multiprogetto nella cartella privata dell'app, con nome, selezione da elenco, sovrascrittura ed eliminazione.
-- Tab distinti `Progetti` e `Salvataggio`: il primo gestisce archivio e opzioni live di visualizzazione, il secondo esporta selettivamente l'intera mappa in GeoJSON, KML o KMZ.
+- Sezioni `Progetti` ed `Esporta` nel menu: la prima gestisce archivio e opzioni live di visualizzazione, la seconda esporta selettivamente l'intera mappa in GeoJSON, KML o KMZ.
 - Ogni progetto salva file GIS, POI, disegni, traccia, inquadratura e tutte le opzioni di visualizzazione: sfondo, layer catastali, trasparenza, misure, foglio importato, barra strumenti e preferenze GPS.
 - GPS nativo MAUI ad alta precisione con permessi Android/iOS.
 - Centratura automatica una tantum all'apertura: prima tramite posizione approssimativa della connessione Internet, poi tramite singola lettura GPS se la rete non restituisce una posizione; nessun punto o cerchio viene mostrato e il tracking continuo non viene avviato.
@@ -26,13 +81,13 @@ App .NET MAUI Blazor Hybrid per Android, iOS, Mac Catalyst e Windows, pensata pe
 - Marker posizione, cerchio accuratezza in metri, tracciamento percorso.
 - Controllo se la posizione GPS cade dentro un poligono importato o disegnato.
 - Interrogazione WFS ufficiale Agenzia delle Entrate attorno alla posizione GPS per evidenziare la particella catastale corrente quando il servizio restituisce la geometria.
-- Mappa a tutto schermo con tab separati Catasto, Dati, Salvataggio e Impostazioni, adattabile agli schermi pieghevoli.
+- Mappa a tutto schermo con menu compatto e pannelli adattabili a telefoni, tablet e schermi pieghevoli.
 - Ingrandimento oltre lo zoom satellitare nativo senza tessere "Map data not yet available".
 - Tendine concatenate Regione, Comune, Foglio e Particella.
 - Ricerca di localita e indirizzi eseguita nativamente con fallback Esri e OpenStreetMap, senza richieste CORS dalla WebView.
 - Catalogo dei Comuni incluso nell'APK e cataloghi regionali OnData scaricati in cache solo quando servono.
 - Ricerca catastale eseguita dal codice .NET nativo, senza DuckDB WebAssembly nella WebView Android.
-- La registrazione della traccia GPS e' disattivata all'avvio; la toolbar di disegno completa puo' essere mostrata o nascosta dal tab Dati.
+- La registrazione della traccia GPS e' disattivata all'avvio; la toolbar di disegno completa puo' essere mostrata o nascosta dalla sezione `Dati e disegni`.
 - Pannello `Layer` accessibile direttamente dalla mappa, con checkbox sincronizzati per confini, numeri particella, fogli, fabbricati, strade e acque.
 - Le particelle cercate possono essere aggiunte una dopo l'altra, mantenendo contemporaneamente sulla mappa tutti i confini selezionati.
 - Comandi separati per rimuovere le particelle selezionate o pulire importazioni, disegni, POI e traccia GPS.

Services/AppUpdateService.cs

@@ -0,0 +1,44 @@
+using System.Net.Http.Json;
+using System.Reflection;
+using System.Text.Json.Serialization;
+
+namespace LMEMappeCatastaliApp.Services;
+
+public sealed class AppUpdateService
+{
+    private const string LatestReleaseUrl = "https://gitea.lmcloud.it/api/v1/repos/livio/LMEMappeCatastaliApp/releases/latest";
+    private readonly HttpClient _httpClient = new() { Timeout = TimeSpan.FromSeconds(20) };
+
+    public static string CurrentVersion =>
+        typeof(AppUpdateService).Assembly
+            .GetCustomAttribute<AssemblyInformationalVersionAttribute>()?
+            .InformationalVersion.Split('+')[0]
+        ?? AppInfo.Current.VersionString;
+
+    public async Task<AppUpdateResult> CheckAsync(CancellationToken cancellationToken = default)
+    {
+        var release = await _httpClient.GetFromJsonAsync<GiteaRelease>(LatestReleaseUrl, cancellationToken)
+            ?? throw new InvalidDataException("Risposta aggiornamenti non valida.");
+        var latestText = (release.TagName ?? string.Empty).TrimStart('v', 'V');
+        _ = Version.TryParse(CurrentVersion, out var current);
+        _ = Version.TryParse(latestText, out var latest);
+        var apk = release.Assets?.FirstOrDefault(item => item.Name?.EndsWith(".apk", StringComparison.OrdinalIgnoreCase) == true);
+        return new(latest is not null && current is not null && latest > current, latestText, release.HtmlUrl ?? string.Empty, apk?.BrowserDownloadUrl ?? release.HtmlUrl ?? string.Empty, release.Body ?? string.Empty);
+    }
+
+    private sealed class GiteaRelease
+    {
+        [JsonPropertyName("tag_name")] public string? TagName { get; set; }
+        [JsonPropertyName("html_url")] public string? HtmlUrl { get; set; }
+        [JsonPropertyName("assets")] public GiteaAsset[]? Assets { get; set; }
+        [JsonPropertyName("body")] public string? Body { get; set; }
+    }
+
+    private sealed class GiteaAsset
+    {
+        [JsonPropertyName("name")] public string? Name { get; set; }
+        [JsonPropertyName("browser_download_url")] public string? BrowserDownloadUrl { get; set; }
+    }
+}
+
+public sealed record AppUpdateResult(bool IsAvailable, string Version, string ReleaseUrl, string DownloadUrl, string ReleaseNotes);

Services/AzureMapsService.cs

@@ -13,7 +13,7 @@ public sealed class AzureMapsService
 
     public AzureMapsService()
     {
-        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.20");
+        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.22");
         _httpClient.DefaultRequestHeaders.Accept.ParseAdd("application/json");
     }
 

Services/CloudSyncService.cs

@@ -0,0 +1,54 @@
+using System.Net.Http.Headers;
+using System.Text;
+
+namespace LMEMappeCatastaliApp.Services;
+
+public sealed class CloudSyncService
+{
+    private readonly HttpClient _httpClient = new() { Timeout = TimeSpan.FromMinutes(3) };
+
+    public async Task UploadAsync(string endpoint, string userName, string password, string localPath, CancellationToken cancellationToken = default)
+    {
+        var target = BuildTarget(endpoint);
+        using var request = new HttpRequestMessage(HttpMethod.Put, target);
+        ApplyCredentials(request, userName, password);
+        request.Content = new StreamContent(File.OpenRead(localPath));
+        request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/zip");
+        using var response = await _httpClient.SendAsync(request, cancellationToken);
+        response.EnsureSuccessStatusCode();
+    }
+
+    public async Task<string> DownloadAsync(string endpoint, string userName, string password, CancellationToken cancellationToken = default)
+    {
+        using var request = new HttpRequestMessage(HttpMethod.Get, BuildTarget(endpoint));
+        ApplyCredentials(request, userName, password);
+        using var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+        response.EnsureSuccessStatusCode();
+        var directory = Path.Combine(FileSystem.CacheDirectory, "CloudSync");
+        Directory.CreateDirectory(directory);
+        var path = Path.Combine(directory, $"LME-cloud-{DateTime.Now:yyyyMMdd-HHmmss}.lmebackup.zip");
+        await using var input = await response.Content.ReadAsStreamAsync(cancellationToken);
+        await using var output = File.Create(path);
+        await input.CopyToAsync(output, cancellationToken);
+        return path;
+    }
+
+    private static Uri BuildTarget(string endpoint)
+    {
+        if (!Uri.TryCreate(endpoint?.Trim(), UriKind.Absolute, out var uri)
+            || (uri.Scheme != Uri.UriSchemeHttps && uri.Scheme != Uri.UriSchemeHttp))
+        {
+            throw new ArgumentException("Inserisci un indirizzo WebDAV http o https valido.");
+        }
+        return uri.AbsolutePath.EndsWith(".zip", StringComparison.OrdinalIgnoreCase)
+            ? uri
+            : new Uri($"{uri.ToString().TrimEnd('/')}/LMEMappeCatastali-sync.lmebackup.zip");
+    }
+
+    private static void ApplyCredentials(HttpRequestMessage request, string userName, string password)
+    {
+        if (string.IsNullOrWhiteSpace(userName)) return;
+        var value = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{userName}:{password}"));
+        request.Headers.Authorization = new AuthenticationHeaderValue("Basic", value);
+    }
+}

Services/MapExportService.cs

@@ -35,6 +35,8 @@ public sealed class MapExportService
         {
             "kml" => "kml",
             "kmz" => "kmz",
+            "gpx" => "gpx",
+            "pdf" => "pdf",
             _ => "geojson"
         };
         var baseName = NormalizeFileName(requestedName);
@@ -49,6 +51,18 @@ public sealed class MapExportService
             return new(path, "application/geo+json", featureCount, Path.GetFileName(path));
         }
 
+        if (format == "gpx")
+        {
+            await File.WriteAllTextAsync(path, BuildGpx(features, baseName), new UTF8Encoding(false), cancellationToken);
+            return new(path, "application/gpx+xml", featureCount, Path.GetFileName(path));
+        }
+
+        if (format == "pdf")
+        {
+            await File.WriteAllBytesAsync(path, BuildPdfReport(features, baseName), cancellationToken);
+            return new(path, "application/pdf", featureCount, Path.GetFileName(path));
+        }
+
         var kml = BuildKml(features, baseName);
         if (format == "kml")
         {
@@ -67,6 +81,173 @@ public sealed class MapExportService
         return new(path, "application/vnd.google-earth.kmz", featureCount, Path.GetFileName(path));
     }
 
+    private static string BuildGpx(JsonElement features, string name)
+    {
+        var root = new XElement("gpx",
+            new XAttribute("version", "1.1"),
+            new XAttribute("creator", "LME Mappe Catastali 0.4.4"),
+            new XAttribute(XNamespace.Xmlns + "xsi", "http://www.w3.org/2001/XMLSchema-instance"),
+            new XElement("metadata", new XElement("name", name)));
+        foreach (var feature in features.EnumerateArray())
+        {
+            if (!feature.TryGetProperty("geometry", out var geometry) || geometry.ValueKind != JsonValueKind.Object) continue;
+            var properties = feature.TryGetProperty("properties", out var value) ? value : default;
+            var featureName = FeatureName(properties, GetString(properties, "_lmeCategory") ?? "drawing");
+            var type = geometry.GetProperty("type").GetString();
+            var coordinates = geometry.GetProperty("coordinates");
+            if (type == "Point")
+            {
+                root.Add(GpxPoint("wpt", coordinates, featureName));
+            }
+            else
+            {
+                foreach (var line in EnumerateGpxLines(type, coordinates))
+                {
+                    root.Add(new XElement("trk", new XElement("name", featureName),
+                        new XElement("trkseg", line.Select(point => GpxPoint("trkpt", point, null)))));
+                }
+            }
+        }
+        return new XDocument(new XDeclaration("1.0", "utf-8", null), root).ToString();
+    }
+
+    private static XElement GpxPoint(string element, JsonElement coordinate, string? name)
+    {
+        var values = coordinate.EnumerateArray().ToArray();
+        var point = new XElement(element,
+            new XAttribute("lat", values[1].GetDouble().ToString("G17", CultureInfo.InvariantCulture)),
+            new XAttribute("lon", values[0].GetDouble().ToString("G17", CultureInfo.InvariantCulture)));
+        if (!string.IsNullOrWhiteSpace(name)) point.Add(new XElement("name", name));
+        return point;
+    }
+
+    private static IEnumerable<JsonElement[]> EnumerateGpxLines(string? type, JsonElement coordinates)
+    {
+        if (type == "LineString") yield return coordinates.EnumerateArray().ToArray();
+        else if (type == "Polygon")
+            foreach (var ring in coordinates.EnumerateArray()) yield return ring.EnumerateArray().ToArray();
+        else if (type == "MultiLineString")
+            foreach (var line in coordinates.EnumerateArray()) yield return line.EnumerateArray().ToArray();
+        else if (type == "MultiPolygon")
+            foreach (var polygon in coordinates.EnumerateArray())
+            foreach (var ring in polygon.EnumerateArray()) yield return ring.EnumerateArray().ToArray();
+    }
+
+    private static byte[] BuildPdfReport(JsonElement features, string title)
+    {
+        var paths = features.EnumerateArray()
+            .Where(feature => feature.TryGetProperty("geometry", out _))
+            .SelectMany(feature => PdfCoordinatePaths(feature.GetProperty("geometry")))
+            .Where(path => path.Count > 0)
+            .ToArray();
+        var points = paths.SelectMany(path => path).ToArray();
+        var minLon = points.Length == 0 ? 0 : points.Min(point => point.Lon);
+        var maxLon = points.Length == 0 ? 1 : points.Max(point => point.Lon);
+        var minLat = points.Length == 0 ? 0 : points.Min(point => point.Lat);
+        var maxLat = points.Length == 0 ? 1 : points.Max(point => point.Lat);
+        var lonSpan = Math.Max(0.0000001, maxLon - minLon);
+        var latSpan = Math.Max(0.0000001, maxLat - minLat);
+        const double mapLeft = 48, mapBottom = 438, mapWidth = 499, mapHeight = 330;
+        var scale = Math.Min(mapWidth / lonSpan, mapHeight / latSpan);
+        var drawing = new StringBuilder("0.08 0.44 0.37 RG 0.86 0.94 0.91 rg 1.4 w ");
+        foreach (var path in paths.Take(400))
+        {
+            for (var pointIndex = 0; pointIndex < path.Count; pointIndex++)
+            {
+                var x = mapLeft + (path[pointIndex].Lon - minLon) * scale;
+                var y = mapBottom + (path[pointIndex].Lat - minLat) * scale;
+                drawing.AppendFormat(CultureInfo.InvariantCulture, "{0:0.##} {1:0.##} {2} ", x, y, pointIndex == 0 ? "m" : "l");
+            }
+            drawing.Append("S ");
+        }
+        drawing.Append("0 0 0 RG 1 w 497 730 m 497 758 l S 497 758 m 491 746 l 503 746 l h f ");
+        var middleLatitude = (minLat + maxLat) / 2;
+        var widthMeters = lonSpan * 111_320 * Math.Cos(middleLatitude * Math.PI / 180);
+        var scaleMeters = Math.Max(1, NiceScaleDistance(widthMeters / 4));
+        var scalePixels = widthMeters <= 0 ? 80 : Math.Clamp(scaleMeters / widthMeters * mapWidth, 35, 150);
+        drawing.AppendFormat(CultureInfo.InvariantCulture, "48 422 m {0:0.##} 422 l S 48 418 m 48 426 l S {0:0.##} 418 m {0:0.##} 426 l S ", 48 + scalePixels);
+        var lines = new List<string>
+        {
+            title,
+            $"Rapporto LME Mappe Catastali - {DateTime.Now:dd/MM/yyyy HH:mm}",
+            $"Oggetti: {features.GetArrayLength()}",
+            $"Scala grafica: {scaleMeters:0} m | Nord: alto pagina",
+            ""
+        };
+        var index = 1;
+        foreach (var feature in features.EnumerateArray())
+        {
+            var properties = feature.TryGetProperty("properties", out var value) ? value : default;
+            var category = GetString(properties, "_lmeCategory") ?? "drawing";
+            var geometry = feature.TryGetProperty("geometry", out var geo) ? geo.GetProperty("type").GetString() : "-";
+            var sheet = GetString(properties, "foglio") ?? GetString(properties, "FOGLIO");
+            var parcel = GetString(properties, "particella") ?? GetString(properties, "PARTICELLA") ?? GetString(properties, "LABEL");
+            var reference = string.Join(" ", new[] { sheet is null ? null : $"F.{sheet}", parcel is null ? null : $"P.{parcel}" }.Where(item => item is not null));
+            lines.Add($"{index++}. {FeatureName(properties, category)} [{category}, {geometry}] {reference}".TrimEnd());
+        }
+        var content = drawing.Append("BT /F1 12 Tf 48 810 Td ");
+        foreach (var line in lines.Take(21))
+        {
+            var safe = line.Replace("\\", "\\\\").Replace("(", "\\(").Replace(")", "\\)")
+                .Select(character => character <= 255 ? character : '?').ToArray();
+            content.Append('(').Append(safe).Append(") Tj 0 -16 Td ");
+        }
+        content.Append("ET");
+        var stream = Encoding.Latin1.GetBytes(content.ToString());
+        var objects = new[]
+        {
+            "<< /Type /Catalog /Pages 2 0 R >>",
+            "<< /Type /Pages /Kids [3 0 R] /Count 1 >>",
+            "<< /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Resources << /Font << /F1 5 0 R >> >> /Contents 4 0 R >>",
+            $"<< /Length {stream.Length} >>\nstream\n{Encoding.Latin1.GetString(stream)}\nendstream",
+            "<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica >>"
+        };
+        using var output = new MemoryStream();
+        using var writer = new StreamWriter(output, Encoding.Latin1, leaveOpen: true) { NewLine = "\n" };
+        writer.Write("%PDF-1.4\n"); writer.Flush();
+        var offsets = new List<long> { 0 };
+        for (var i = 0; i < objects.Length; i++)
+        {
+            offsets.Add(output.Position); writer.Write($"{i + 1} 0 obj\n{objects[i]}\nendobj\n"); writer.Flush();
+        }
+        var xref = output.Position;
+        writer.Write($"xref\n0 {objects.Length + 1}\n0000000000 65535 f \n");
+        foreach (var offset in offsets.Skip(1)) writer.Write($"{offset:0000000000} 00000 n \n");
+        writer.Write($"trailer << /Size {objects.Length + 1} /Root 1 0 R >>\nstartxref\n{xref}\n%%EOF");
+        writer.Flush();
+        return output.ToArray();
+    }
+
+    private static double NiceScaleDistance(double value)
+    {
+        if (value <= 0) return 1;
+        var power = Math.Pow(10, Math.Floor(Math.Log10(value)));
+        var normalized = value / power;
+        var nice = normalized >= 5 ? 5 : normalized >= 2 ? 2 : 1;
+        return nice * power;
+    }
+
+    private static IEnumerable<List<(double Lon, double Lat)>> PdfCoordinatePaths(JsonElement geometry)
+    {
+        if (!geometry.TryGetProperty("type", out var typeElement) || !geometry.TryGetProperty("coordinates", out var coordinates)) yield break;
+        var type = typeElement.GetString();
+        if (type == "Point") { yield return [PdfPoint(coordinates)]; yield break; }
+        if (type == "LineString") { yield return coordinates.EnumerateArray().Select(PdfPoint).ToList(); yield break; }
+        if (type == "Polygon" || type == "MultiLineString")
+        {
+            foreach (var path in coordinates.EnumerateArray()) yield return path.EnumerateArray().Select(PdfPoint).ToList();
+            yield break;
+        }
+        if (type == "MultiPolygon")
+        {
+            foreach (var polygon in coordinates.EnumerateArray())
+            foreach (var path in polygon.EnumerateArray()) yield return path.EnumerateArray().Select(PdfPoint).ToList();
+        }
+    }
+
+    private static (double Lon, double Lat) PdfPoint(JsonElement coordinate) =>
+        (coordinate[0].GetDouble(), coordinate[1].GetDouble());
+
     private static string BuildKml(JsonElement features, string documentName)
     {
         var document = new XElement(Kml + "Document",
@@ -78,6 +259,8 @@ public sealed class MapExportService
             BuildStyle("drawing", "ff1679f9", "333c92fb"),
             BuildStyle("poi", "ffff7a00", "33ff7a00"),
             BuildStyle("gps-trail", "ff00a5ff", "2200a5ff"));
+        var categoryFolders = new Dictionary<string, XElement>(StringComparer.Ordinal);
+        var groupFolders = new Dictionary<(string Category, string Group), XElement>();
 
         foreach (var feature in features.EnumerateArray())
         {
@@ -95,6 +278,11 @@ public sealed class MapExportService
             var placemark = new XElement(Kml + "Placemark",
                 new XElement(Kml + "name", FeatureName(properties, category)),
                 new XElement(Kml + "styleUrl", $"#{NormalizeStyleId(category)}"));
+            var featureStyle = BuildFeatureStyle(properties);
+            if (featureStyle is not null)
+            {
+                placemark.Add(featureStyle);
+            }
 
             var extendedData = BuildExtendedData(properties);
             if (extendedData is not null)
@@ -102,7 +290,31 @@ public sealed class MapExportService
                 placemark.Add(extendedData);
             }
             placemark.Add(BuildGeometry(geometry));
-            document.Add(placemark);
+            var categoryName = GetString(properties, "_lmeCategoryName")?.Trim();
+            var groupName = GetString(properties, "_lmeGroupName")?.Trim();
+            var parent = document;
+            if (!string.IsNullOrWhiteSpace(categoryName))
+            {
+                if (!categoryFolders.TryGetValue(categoryName, out var categoryFolder))
+                {
+                    categoryFolder = new XElement(Kml + "Folder", new XElement(Kml + "name", categoryName));
+                    categoryFolders[categoryName] = categoryFolder;
+                    document.Add(categoryFolder);
+                }
+                parent = categoryFolder;
+            }
+            if (!string.IsNullOrWhiteSpace(groupName))
+            {
+                var key = (categoryName ?? string.Empty, groupName);
+                if (!groupFolders.TryGetValue(key, out var groupFolder))
+                {
+                    groupFolder = new XElement(Kml + "Folder", new XElement(Kml + "name", groupName));
+                    groupFolders[key] = groupFolder;
+                    parent.Add(groupFolder);
+                }
+                parent = groupFolder;
+            }
+            parent.Add(placemark);
         }
 
         return new XDocument(new XDeclaration("1.0", "utf-8", null), new XElement(Kml + "kml", document)).ToString();
@@ -116,6 +328,37 @@ public sealed class MapExportService
                 new XElement(Kml + "width", 3)),
             new XElement(Kml + "PolyStyle", new XElement(Kml + "color", fillColor)));
 
+    private static XElement? BuildFeatureStyle(JsonElement properties)
+    {
+        var color = GetString(properties, "_lmeColor");
+        var fillColor = GetString(properties, "_lmeFillColor") ?? color;
+        if (string.IsNullOrWhiteSpace(color) && string.IsNullOrWhiteSpace(fillColor)) return null;
+        var weight = GetNumber(properties, "_lmeWeight", 3);
+        var opacity = GetNumber(properties, "_lmeOpacity", 1);
+        var fillOpacity = GetNumber(properties, "_lmeFillOpacity", 0.2);
+        return new XElement(Kml + "Style",
+            new XElement(Kml + "LineStyle",
+                new XElement(Kml + "color", ToKmlColor(color ?? "#f97316", opacity)),
+                new XElement(Kml + "width", weight.ToString("0.##", CultureInfo.InvariantCulture))),
+            new XElement(Kml + "PolyStyle",
+                new XElement(Kml + "color", ToKmlColor(fillColor ?? "#fb923c", fillOpacity))));
+    }
+
+    private static double GetNumber(JsonElement properties, string name, double fallback) =>
+        properties.ValueKind == JsonValueKind.Object
+        && properties.TryGetProperty(name, out var value)
+        && value.ValueKind == JsonValueKind.Number
+            ? value.GetDouble()
+            : fallback;
+
+    private static string ToKmlColor(string html, double opacity)
+    {
+        var value = html.TrimStart('#');
+        if (value.Length != 6) value = "f97316";
+        var alpha = (int)Math.Round(Math.Clamp(opacity, 0, 1) * 255);
+        return $"{alpha:x2}{value[4..6]}{value[2..4]}{value[0..2]}";
+    }
+
     private static XElement? BuildExtendedData(JsonElement properties)
     {
         if (properties.ValueKind != JsonValueKind.Object)
@@ -185,7 +428,8 @@ public sealed class MapExportService
     }
 
     private static string FeatureName(JsonElement properties, string category) =>
-        GetString(properties, "name")
+        GetString(properties, "_lmeDisplayName")
+        ?? GetString(properties, "name")
         ?? GetString(properties, "Name")
         ?? GetString(properties, "LABEL")
         ?? GetString(properties, "NATIONALCADASTRALREFERENCE")

Services/NetworkLocationService.cs

@@ -13,7 +13,7 @@ public sealed class NetworkLocationService
 
     public NetworkLocationService()
     {
-        httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.20");
+        httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.22");
     }
 
     public async Task<NetworkLocationSnapshot?> GetApproximateLocationAsync(

Services/OfficialCadastreService.cs

@@ -44,7 +44,7 @@ public sealed class OfficialCadastreService
             ["SRSNAME"] = "urn:ogc:def:crs:EPSG::6706",
             ["BBOX"] = bbox,
             ["REQUEST"] = "GetFeature",
-            ["COUNT"] = "20"
+            ["COUNT"] = "100"
         };
 
         var url = WfsEndpoint + "?" + string.Join("&", query.Select(item =>

Services/ProjectStorageService.cs

@@ -1,5 +1,6 @@
 using System.Text;
 using System.Text.Json;
+using System.IO.Compression;
 
 namespace LMEMappeCatastaliApp.Services;
 
@@ -13,8 +14,9 @@ public sealed class ProjectStorageService
     };
 
     private string ProjectsDirectory => Path.Combine(FileSystem.AppDataDirectory, "Projects");
+    private string HistoryDirectory => Path.Combine(ProjectsDirectory, ".history");
 
-    public async Task<IReadOnlyList<MapProjectSummary>> GetProjectsAsync()
+    public async Task<IReadOnlyList<MapProjectSummary>> GetProjectsAsync(bool includeArchived = true)
     {
         await _gate.WaitAsync();
         try
@@ -22,6 +24,7 @@ public sealed class ProjectStorageService
             var files = await ReadProjectFilesAsync();
             return files
                 .Select(item => item.Document.ToSummary())
+                .Where(item => includeArchived || !item.IsArchived)
                 .OrderByDescending(item => item.UpdatedAt)
                 .ThenBy(item => item.Name, StringComparer.CurrentCultureIgnoreCase)
                 .ToArray();
@@ -56,17 +59,32 @@ public sealed class ProjectStorageService
 
             var now = DateTimeOffset.UtcNow;
             var id = existing?.Document.Id ?? Guid.NewGuid().ToString("N");
+            if (existing is not null)
+            {
+                Directory.CreateDirectory(HistoryDirectory);
+                var revisionName = $"{id}--{existing.Document.UpdatedAt:yyyyMMddHHmmssfff}{ProjectExtension}";
+                File.Copy(existing.Path, Path.Combine(HistoryDirectory, revisionName), true);
+                PruneHistory(id, 15);
+            }
             var document = new MapProjectDocument
             {
-                SchemaVersion = 1,
+                SchemaVersion = 3,
                 Id = id,
                 Name = normalizedName,
                 CreatedAt = existing?.Document.CreatedAt ?? now,
                 UpdatedAt = now,
                 IncludesCadastralParcels = includesCadastralParcels,
+                Folder = existing?.Document.Folder ?? string.Empty,
+                IsArchived = existing?.Document.IsArchived ?? false,
+                AccessMode = existing?.Document.AccessMode ?? "editable",
                 Map = snapshotDocument.RootElement.Clone()
             };
 
+            if (existing?.Document.AccessMode == "readonly")
+            {
+                throw new InvalidOperationException("Il progetto e' in sola lettura. Duplicalo per modificarlo.");
+            }
+
             var path = existing?.Path ?? Path.Combine(ProjectsDirectory, BuildFileName(normalizedName, id));
             var temporaryPath = path + ".tmp";
             try
@@ -93,6 +111,194 @@ public sealed class ProjectStorageService
         }
     }
 
+    public async Task<MapProjectSummary> DuplicateAsync(string projectId)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            var files = await ReadProjectFilesAsync();
+            var source = files.FirstOrDefault(item => item.Document.Id == projectId)
+                ?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
+            var usedNames = files.Select(item => item.Document.Name).ToHashSet(StringComparer.CurrentCultureIgnoreCase);
+            var baseName = $"{source.Document.Name} - copia";
+            var name = baseName;
+            for (var index = 2; usedNames.Contains(name); index++)
+            {
+                name = $"{baseName} {index}";
+            }
+            var now = DateTimeOffset.UtcNow;
+            var id = Guid.NewGuid().ToString("N");
+            var copy = new MapProjectDocument
+            {
+                SchemaVersion = 2,
+                Id = id,
+                Name = name,
+                CreatedAt = now,
+                UpdatedAt = now,
+                IncludesCadastralParcels = source.Document.IncludesCadastralParcels,
+                Folder = source.Document.Folder,
+                AccessMode = "editable",
+                Map = source.Document.Map.Clone()
+            };
+            var path = Path.Combine(ProjectsDirectory, BuildFileName(name, id));
+            await File.WriteAllTextAsync(path, JsonSerializer.Serialize(copy, _jsonOptions), new UTF8Encoding(false));
+            return copy.ToSummary();
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task UpdateOrganizationAsync(string projectId, string? folder = null, bool? isArchived = null)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            var project = (await ReadProjectFilesAsync()).FirstOrDefault(item => item.Document.Id == projectId)
+                ?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
+            project.Document.Folder = NormalizeFolder(folder ?? project.Document.Folder);
+            project.Document.IsArchived = isArchived ?? project.Document.IsArchived;
+            project.Document.UpdatedAt = DateTimeOffset.UtcNow;
+            await File.WriteAllTextAsync(project.Path, JsonSerializer.Serialize(project.Document, _jsonOptions), new UTF8Encoding(false));
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<IReadOnlyList<MapProjectVersion>> GetVersionsAsync(string projectId)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            Directory.CreateDirectory(HistoryDirectory);
+            var versions = new List<MapProjectVersion>();
+            foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}"))
+            {
+                try
+                {
+                    await using var stream = File.OpenRead(path);
+                    var document = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions);
+                    if (document is not null)
+                    {
+                        versions.Add(new(Path.GetFileName(path), document.UpdatedAt));
+                    }
+                }
+                catch (JsonException) { }
+                catch (IOException) { }
+            }
+            return versions.OrderByDescending(item => item.UpdatedAt).ToArray();
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<string> LoadVersionAsync(string projectId, string versionId)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            if (!versionId.StartsWith($"{projectId}--", StringComparison.Ordinal)
+                || Path.GetFileName(versionId) != versionId)
+            {
+                throw new InvalidDataException("Revisione non valida.");
+            }
+            var path = Path.Combine(HistoryDirectory, versionId);
+            await using var stream = File.OpenRead(path);
+            var document = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions)
+                ?? throw new InvalidDataException("Revisione non leggibile.");
+            return document.Map.GetRawText();
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<string> CreateBackupAsync()
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            Directory.CreateDirectory(ProjectsDirectory);
+            var directory = Path.Combine(FileSystem.CacheDirectory, "Backups");
+            Directory.CreateDirectory(directory);
+            var path = Path.Combine(directory, $"LMEMappeCatastali-backup-{DateTime.Now:yyyyMMdd-HHmmss}.lmebackup.zip");
+            if (File.Exists(path)) File.Delete(path);
+            ZipFile.CreateFromDirectory(ProjectsDirectory, path, CompressionLevel.Optimal, false);
+            return path;
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<int> RestoreBackupAsync(string backupPath)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            Directory.CreateDirectory(ProjectsDirectory);
+            using var archive = ZipFile.OpenRead(backupPath);
+            var restored = 0;
+            foreach (var entry in archive.Entries.Where(item => item.FullName.EndsWith(ProjectExtension, StringComparison.OrdinalIgnoreCase)))
+            {
+                var fileName = Path.GetFileName(entry.FullName);
+                if (string.IsNullOrWhiteSpace(fileName)) continue;
+                var targetDirectory = entry.FullName.Contains(".history/", StringComparison.OrdinalIgnoreCase)
+                    || entry.FullName.Contains(".history\\", StringComparison.OrdinalIgnoreCase)
+                    ? HistoryDirectory : ProjectsDirectory;
+                Directory.CreateDirectory(targetDirectory);
+                entry.ExtractToFile(Path.Combine(targetDirectory, fileName), true);
+                if (targetDirectory == ProjectsDirectory) restored++;
+            }
+            return restored;
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<string> CreateProjectPackageAsync(string projectId, bool readOnly = false)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            var project = (await ReadProjectFilesAsync()).FirstOrDefault(item => item.Document.Id == projectId)
+                ?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
+            var directory = Path.Combine(FileSystem.CacheDirectory, "Projects");
+            Directory.CreateDirectory(directory);
+            var mode = readOnly ? "readonly" : "editable";
+            var path = Path.Combine(directory, $"{Path.GetFileNameWithoutExtension(project.Path)}-{mode}{ProjectExtension}");
+            var package = new MapProjectDocument
+            {
+                SchemaVersion = 3,
+                Id = project.Document.Id,
+                Name = project.Document.Name,
+                CreatedAt = project.Document.CreatedAt,
+                UpdatedAt = project.Document.UpdatedAt,
+                IncludesCadastralParcels = project.Document.IncludesCadastralParcels,
+                Folder = project.Document.Folder,
+                IsArchived = false,
+                AccessMode = mode,
+                Map = project.Document.Map.Clone()
+            };
+            await File.WriteAllTextAsync(path, JsonSerializer.Serialize(package, _jsonOptions), new UTF8Encoding(false));
+            return path;
+        }
+        finally { _gate.Release(); }
+    }
+
+    public async Task<MapProjectSummary> ImportProjectAsync(string path)
+    {
+        await _gate.WaitAsync();
+        try
+        {
+            await using var stream = File.OpenRead(path);
+            var source = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions)
+                ?? throw new InvalidDataException("Progetto non leggibile.");
+            if (source.Map.ValueKind != JsonValueKind.Object) throw new InvalidDataException("Mappa del progetto non valida.");
+            source.Id = Guid.NewGuid().ToString("N");
+            source.Name = NormalizeName(source.Name);
+            source.CreatedAt = source.UpdatedAt = DateTimeOffset.UtcNow;
+            source.IsArchived = false;
+            source.AccessMode = source.AccessMode == "readonly" ? "readonly" : "editable";
+            Directory.CreateDirectory(ProjectsDirectory);
+            var target = Path.Combine(ProjectsDirectory, BuildFileName(source.Name, source.Id));
+            await File.WriteAllTextAsync(target, JsonSerializer.Serialize(source, _jsonOptions), new UTF8Encoding(false));
+            return source.ToSummary();
+        }
+        finally { _gate.Release(); }
+    }
+
     public async Task<string> LoadAsync(string projectId)
     {
         await _gate.WaitAsync();
@@ -118,6 +324,13 @@ public sealed class ProjectStorageService
                 .FirstOrDefault(item => item.Document.Id == projectId)
                 ?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
             File.Delete(project.Path);
+            if (Directory.Exists(HistoryDirectory))
+            {
+                foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}"))
+                {
+                    File.Delete(path);
+                }
+            }
         }
         finally
         {
@@ -125,6 +338,30 @@ public sealed class ProjectStorageService
         }
     }
 
+    public async Task<string> CreateScheduledBackupAsync(int keep = 10)
+    {
+        var source = await CreateBackupAsync();
+        var directory = Path.Combine(FileSystem.AppDataDirectory, "AutomaticBackups");
+        Directory.CreateDirectory(directory);
+        var target = Path.Combine(directory, $"LME-auto-{DateTime.Now:yyyyMMdd-HHmmss}.lmebackup.zip");
+        File.Copy(source, target, true);
+        foreach (var stale in Directory.EnumerateFiles(directory, "*.lmebackup.zip")
+                     .OrderByDescending(File.GetLastWriteTimeUtc).Skip(Math.Clamp(keep, 2, 30)))
+        {
+            File.Delete(stale);
+        }
+        return target;
+    }
+
+    public DateTimeOffset? GetLatestScheduledBackupTime()
+    {
+        var directory = Path.Combine(FileSystem.AppDataDirectory, "AutomaticBackups");
+        if (!Directory.Exists(directory)) return null;
+        var latest = Directory.EnumerateFiles(directory, "*.lmebackup.zip")
+            .OrderByDescending(File.GetLastWriteTimeUtc).FirstOrDefault();
+        return latest is null ? null : File.GetLastWriteTimeUtc(latest);
+    }
+
     private async Task<IReadOnlyList<ProjectFileEntry>> ReadProjectFilesAsync()
     {
         Directory.CreateDirectory(ProjectsDirectory);
@@ -179,19 +416,37 @@ public sealed class ProjectStorageService
         return $"{safeName}--{id[..8]}{ProjectExtension}";
     }
 
+    private void PruneHistory(string projectId, int keep)
+    {
+        foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}")
+                     .OrderByDescending(File.GetLastWriteTimeUtc).Skip(keep))
+        {
+            File.Delete(path);
+        }
+    }
+
+    private static string NormalizeFolder(string value)
+    {
+        var normalized = string.Join(' ', (value ?? string.Empty).Split([' ', '\t', '\r', '\n'], StringSplitOptions.RemoveEmptyEntries));
+        return normalized[..Math.Min(normalized.Length, 60)];
+    }
+
     private sealed record ProjectFileEntry(string Path, MapProjectDocument Document);
 
     private sealed class MapProjectDocument
     {
-        public int SchemaVersion { get; init; }
+        public int SchemaVersion { get; set; }
-        public string Id { get; init; } = string.Empty;
+        public string Id { get; set; } = string.Empty;
-        public string Name { get; init; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
-        public DateTimeOffset CreatedAt { get; init; }
+        public DateTimeOffset CreatedAt { get; set; }
-        public DateTimeOffset UpdatedAt { get; init; }
+        public DateTimeOffset UpdatedAt { get; set; }
-        public bool IncludesCadastralParcels { get; init; }
+        public bool IncludesCadastralParcels { get; set; }
-        public JsonElement Map { get; init; }
+        public string Folder { get; set; } = string.Empty;
+        public bool IsArchived { get; set; }
+        public string AccessMode { get; set; } = "editable";
+        public JsonElement Map { get; set; }
 
-        public MapProjectSummary ToSummary() => new(Id, Name, UpdatedAt, IncludesCadastralParcels);
+        public MapProjectSummary ToSummary() => new(Id, Name, UpdatedAt, IncludesCadastralParcels, Folder, IsArchived, AccessMode == "readonly");
     }
 }
 
@@ -199,4 +454,9 @@ public sealed record MapProjectSummary(
     string Id,
     string Name,
     DateTimeOffset UpdatedAt,
-    bool IncludesCadastralParcels);
+    bool IncludesCadastralParcels,
+    string Folder,
+    bool IsArchived,
+    bool IsReadOnly);
+
+public sealed record MapProjectVersion(string Id, DateTimeOffset UpdatedAt);

wwwroot/css/app.css

@@ -7,7 +7,7 @@
     --accent: #14705e;
     --accent-strong: #0c5749;
     --warning: #a34b08;
-    --nav-height: 64px;
+    --nav-height: 0px;
 }
 
 html,
@@ -135,6 +135,71 @@ input[type="checkbox"] {
     flex: 0 0 auto;
 }
 
+.map-icon-command,
+.map-menu-button {
+    width: 38px;
+    min-width: 38px;
+    min-height: 38px;
+    padding: 0;
+    background: #fff;
+    color: var(--ink);
+    font-size: 22px;
+    line-height: 1;
+}
+
+.map-menu-button.is-active {
+    background: #ccebe3;
+    color: var(--accent-strong);
+}
+
+.app-status-line i {
+    display: inline-block;
+    width: 8px;
+    height: 8px;
+    margin-left: 5px;
+    border-radius: 50%;
+    background: #fbbf24;
+}
+
+.map-navigation-menu {
+    position: absolute;
+    top: 70px;
+    right: 12px;
+    left: auto;
+    z-index: 1150;
+    display: grid;
+    width: min(300px, calc(100vw - 24px));
+    max-height: calc(100vh - 84px);
+    overflow-y: auto;
+    border: 1px solid var(--line);
+    border-radius: 8px;
+    padding: 7px;
+    background: rgba(255, 255, 255, 0.99);
+    box-shadow: 0 5px 22px rgba(0, 0, 0, 0.3);
+}
+
+.map-navigation-menu > button {
+    min-height: 40px;
+    border-bottom: 1px solid #e5eaed;
+    border-radius: 0;
+    background: transparent;
+    color: var(--ink);
+    text-align: left;
+}
+
+.menu-credits {
+    display: grid;
+    gap: 3px;
+    padding: 10px 12px 5px;
+    color: var(--muted);
+    font-size: 10px;
+    line-height: 1.35;
+}
+
+.menu-credits a {
+    color: var(--accent-strong);
+}
+
 .layer-button.is-active {
     background: #ccebe3;
     color: var(--accent-strong);
@@ -176,10 +241,12 @@ input[type="checkbox"] {
     position: absolute;
     top: 72px;
     right: 12px;
-    z-index: 940;
+    left: auto;
+    bottom: calc(var(--nav-height) + 8px);
+    z-index: 1080;
     display: grid;
-    width: min(320px, calc(100% - 24px));
+    box-sizing: border-box;
-    max-height: calc(100% - 152px);
+    width: min(480px, 50vw);
     overflow-y: auto;
     border: 1px solid var(--line);
     border-radius: 8px;
@@ -239,6 +306,73 @@ input[type="checkbox"] {
     padding-top: 9px;
 }
 
+.menu-help {
+    margin-top: 4px;
+    border: 1px solid #c8d3d8;
+    border-radius: 6px;
+    background: #f7fafb;
+    color: var(--ink);
+}
+
+.menu-help summary {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    min-height: 40px;
+    padding: 7px 10px;
+    cursor: pointer;
+    list-style: none;
+    font-size: 12px;
+}
+
+.menu-help summary::-webkit-details-marker {
+    display: none;
+}
+
+.menu-help summary > span {
+    display: grid;
+    place-items: center;
+    width: 22px;
+    height: 22px;
+    border: 1px solid #82949d;
+    border-radius: 50%;
+    color: #42535c;
+    font-weight: 900;
+}
+
+.menu-help summary::after {
+    margin-left: auto;
+    content: "\25BE";
+    color: #52636b;
+    font-size: 14px;
+    transition: transform 140ms ease;
+}
+
+.menu-help[open] summary::after {
+    transform: rotate(180deg);
+}
+
+.menu-help-content {
+    padding: 10px 12px 12px;
+    border-top: 1px solid #d8e0e4;
+    font-size: 11px;
+    line-height: 1.45;
+}
+
+.menu-help-content p {
+    margin: 0 0 8px;
+    font-weight: 700;
+}
+
+.menu-help-content ol {
+    margin: 0;
+    padding-left: 18px;
+}
+
+.menu-help-content li + li {
+    margin-top: 6px;
+}
+
 .layer-tree-section {
     display: grid;
     gap: 6px;
@@ -262,20 +396,234 @@ input[type="checkbox"] {
     gap: 4px;
 }
 
+.layer-selection-toolbar {
+    position: sticky;
+    top: -9px;
+    z-index: 3;
+    display: grid;
+    gap: 6px;
+    padding: 8px 4px;
+    border-bottom: 1px solid var(--line);
+    background: rgba(255, 255, 255, 0.98);
+}
+
+.layer-selection-toolbar label,
+.layer-object-tools > label:not(.layer-manager-suboption),
+.layer-style-controls label {
+    display: grid;
+    gap: 3px;
+    font-size: 9px;
+}
+
+.layer-selection-summary {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 6px;
+    font-size: 10px;
+}
+
+.layer-selection-summary button,
+.layer-batch-actions button,
+.layer-compact-actions button,
+.layer-object-tools > button {
+    min-height: 28px;
+    min-width: 0;
+    padding: 4px 6px;
+    font-size: 9px;
+}
+
+.layer-selection-summary button {
+    max-width: 48%;
+}
+
+.layer-batch-actions,
+.layer-compact-actions {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 4px;
+}
+
+.layer-group-tools,
+.layer-object-tools {
+    display: grid;
+    gap: 6px;
+    min-width: 0;
+    padding: 7px;
+    border: 1px dashed var(--layer-group-border, #cbd5da);
+    border-radius: 4px;
+    background: rgba(255, 255, 255, 0.7);
+}
+
+.layer-group-tools {
+    margin: 0 3px 4px;
+}
+
+.layer-group-totals {
+    color: var(--muted);
+    font-size: 9px;
+}
+
+.layer-style-controls {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 5px;
+}
+
+.layer-style-controls input,
+.layer-style-controls select,
+.layer-object-tools textarea {
+    width: 100%;
+    min-width: 0;
+    min-height: 28px;
+    padding: 3px;
+    font-size: 10px;
+}
+
+.layer-style-controls input[type="color"] {
+    padding: 1px;
+}
+
+.layer-color-editor {
+    grid-column: 1 / -1;
+    display: grid;
+    gap: 5px;
+    padding: 6px;
+    border: 1px solid #cbd5da;
+    border-radius: 4px;
+    background: rgba(255, 255, 255, 0.82);
+}
+
+.layer-color-editor > header {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) 46px auto;
+    align-items: center;
+    gap: 5px;
+    font-size: 10px;
+}
+
+.layer-color-editor > header input[type="color"] {
+    width: 46px;
+    min-height: 30px;
+}
+
+.layer-color-editor button {
+    min-height: 28px;
+    min-width: 0;
+    padding: 3px 6px;
+    font-size: 9px;
+}
+
+.layer-color-formats {
+    display: grid;
+    gap: 4px;
+}
+
+.layer-color-formats label {
+    grid-template-columns: 30px minmax(0, 1fr);
+    align-items: center;
+}
+
+.layer-color-formats input {
+    font-family: Consolas, "Courier New", monospace;
+}
+
+.layer-color-copy {
+    justify-self: stretch;
+}
+
+.layer-photo-picker {
+    position: relative;
+    min-height: 32px;
+    place-items: center;
+    border: 1px dashed #8aa2aa;
+    border-radius: 4px;
+}
+
+.layer-photo-picker input {
+    position: absolute;
+    inset: 0;
+    opacity: 0;
+}
+
+.layer-photo-preview {
+    display: block;
+    width: 100%;
+    max-height: 140px;
+    object-fit: contain;
+}
+
+.lme-popup-photo {
+    display: block;
+    width: min(240px, 60vw);
+    max-height: 180px;
+    margin-top: 6px;
+    object-fit: contain;
+}
+
+.lme-permanent-label {
+    width: 0 !important;
+    height: 0 !important;
+    border: 0 !important;
+    background: transparent !important;
+}
+
+.lme-permanent-label span {
+    position: absolute;
+    transform: translate(-50%, -50%);
+    padding: 2px 5px;
+    border: 1px solid #52616c;
+    border-radius: 3px;
+    background: rgba(255, 255, 255, 0.92);
+    color: #17212b;
+    font-size: 10px;
+    font-weight: 800;
+    white-space: nowrap;
+}
+
+.lme-offline-tile {
+    box-sizing: border-box;
+    width: 256px;
+    height: 256px;
+    border: 1px solid #d8e0e3;
+    background-color: #f5f7f8;
+}
+
 .layer-manager-group,
 .layer-manager-block,
 .layer-manager-object {
-    border: 1px solid #dce3e6;
+    border: 1px solid var(--layer-group-border, #dce3e6);
     border-radius: 6px;
-    background: #fff;
+    background: var(--layer-group-surface, #fff);
+}
+
+.layer-manager-group > summary {
+    background: var(--layer-group-parent, #f6f8f9);
+}
+
+.layer-manager-block > summary {
+    background: color-mix(in srgb, var(--layer-group-parent, #f6f8f9) 72%, white);
+}
+
+.layer-manager-object > summary {
+    background: color-mix(in srgb, var(--layer-group-parent, #f6f8f9) 42%, white);
+}
+
+.layer-manager-details,
+.layer-group-tools {
+    background: color-mix(in srgb, var(--layer-group-parent, #f6f8f9) 22%, white);
 }
 
 .layer-manager-group > summary,
 .layer-manager-block > summary,
 .layer-manager-object > summary {
     display: grid;
-    grid-template-columns: 28px 20px minmax(0, 1fr) auto auto;
+    grid-template-columns: 28px 28px minmax(0, 1fr) 50px;
-    align-items: center;
+    grid-template-areas:
+        "handle expand title count"
+        ". . visibility moves"
+        "actions actions actions actions";
+    align-items: start;
     gap: 6px;
     min-height: 38px;
     padding: 4px 6px;
@@ -283,6 +631,24 @@ input[type="checkbox"] {
     list-style: none;
 }
 
+.layer-expand-button {
+    grid-area: expand;
+    grid-row: 1 / span 3;
+    align-self: center;
+    justify-self: center;
+    width: 28px;
+    min-width: 28px;
+    height: 28px;
+    min-height: 28px;
+    padding: 0;
+    border: 1px solid #cbd5da;
+    border-radius: 4px;
+    background: #fff;
+    color: var(--ink);
+    font-size: 18px;
+    line-height: 1;
+}
+
 .layer-manager-group > summary::-webkit-details-marker,
 .layer-manager-block > summary::-webkit-details-marker,
 .layer-manager-object > summary::-webkit-details-marker {
@@ -290,6 +656,7 @@ input[type="checkbox"] {
 }
 
 .layer-drag-handle {
+    grid-area: handle;
     width: 28px;
     height: 28px;
     border: 0;
@@ -302,7 +669,68 @@ input[type="checkbox"] {
     cursor: grab;
 }
 
+.layer-row-actions {
+    grid-area: actions;
+    display: grid;
+    grid-template-columns: minmax(0, 1fr);
+    width: 100%;
+    gap: 4px;
+    margin-top: 2px;
+}
+
+.layer-manager-group > summary > input,
+.layer-manager-block > summary > input,
+.layer-manager-object > summary > input {
+    grid-area: visibility;
+    justify-self: start;
+    width: 20px;
+    height: 20px;
+    margin: 1px 0;
+}
+
+.layer-rename-button,
+.layer-membership-button,
+.layer-remove-button {
+    width: 100%;
+    min-height: 28px;
+    min-width: 0;
+    padding: 4px;
+    border: 1px solid #bfd4cd;
+    border-radius: 4px;
+    background: #eef8f5;
+    color: var(--accent-strong);
+    font-size: 10px;
+    font-weight: 800;
+    line-height: 1.15;
+    overflow-wrap: anywhere;
+}
+
+.layer-rename-button:active {
+    background: #d9eee7;
+}
+
+.layer-membership-button {
+    border-color: #bfdbfe;
+    background: #eff6ff;
+    color: #1d4ed8;
+}
+
+.layer-membership-button:active {
+    background: #dbeafe;
+}
+
+.layer-remove-button {
+    border-color: #fecaca;
+    background: #fff1f2;
+    color: #b42318;
+}
+
+.layer-remove-button:active {
+    background: #ffe4e6;
+}
+
 .layer-move-buttons {
+    grid-area: moves;
     display: inline-grid;
     grid-template-columns: 24px 24px;
     gap: 2px;
@@ -326,29 +754,242 @@ input[type="checkbox"] {
 }
 
 .layer-manager-title {
+    grid-area: title;
     min-width: 0;
     overflow-wrap: anywhere;
+    color: var(--layer-group-accent, var(--ink));
     font-size: 12px;
-    font-weight: 700;
+}
+
+.layer-manager-group > summary > .layer-manager-title {
+    font-size: 13px;
+    font-weight: 800;
+}
+
+.layer-manager-block > summary > .layer-manager-title {
+    font-size: 12px;
+    font-weight: 800;
+}
+
+.layer-manager-object > summary > .layer-manager-title {
+    font-size: 11px;
+    font-style: italic;
+    font-weight: 400;
+}
+
+.layer-inline-lock {
+    grid-area: visibility;
+    justify-self: center;
+    width: 28px;
+    min-width: 28px;
+    min-height: 24px;
+    margin-left: 26px;
+    padding: 0;
+    background: transparent;
+    color: var(--ink);
+    font-size: 15px;
+}
+
+.layer-inline-lock.is-locked {
+    background: #fff2cc;
+}
+
+.project-readonly .leaflet-draw,
+.project-readonly .layer-rename-button,
+.project-readonly .layer-membership-button,
+.project-readonly .layer-remove-button,
+.project-readonly .layer-inline-lock,
+.project-readonly .layer-object-tools,
+.project-readonly .layer-group-tools,
+.project-readonly .layer-batch-actions {
+    pointer-events: none;
+    opacity: 0.5;
+}
+
+.lme-app-dialog {
+    position: absolute;
+    inset: 0;
+    z-index: 1500;
+    display: grid;
+    place-items: center;
+    padding: 16px;
+    background: rgba(15, 23, 28, 0.48);
+}
+
+.lme-app-dialog > section {
+    display: flex;
+    flex-direction: column;
+    width: min(820px, 96vw);
+    max-height: 88vh;
+    overflow: hidden;
+    border-radius: 8px;
+    background: #fff;
+    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.32);
+}
+
+.lme-app-dialog header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 12px;
+    border-bottom: 1px solid var(--line);
+}
+
+.lme-app-dialog header button {
+    width: 36px;
+    min-width: 36px;
+    min-height: 34px;
+    padding: 0;
+    background: #e9eef0;
+    color: var(--ink);
+    font-size: 22px;
+}
+
+.lme-app-dialog-body {
+    overflow: auto;
+    padding: 12px;
+}
+
+.object-table-wrap {
+    overflow: auto;
+}
+
+.object-table-wrap table {
+    width: 100%;
+    border-collapse: collapse;
+    font-size: 12px;
+}
+
+.object-table-wrap th,
+.object-table-wrap td {
+    padding: 7px;
+    border-bottom: 1px solid var(--line);
+    text-align: left;
+    white-space: nowrap;
+}
+
+.object-table-wrap button {
+    width: 30px;
+    min-width: 30px;
+    min-height: 30px;
+    padding: 0;
+}
+
+.object-table-search,
+.coordinate-result {
+    display: grid;
+    gap: 8px;
+    margin-bottom: 10px;
+}
+
+.release-notes {
+    max-height: 220px;
+    overflow: auto;
+    margin: 8px 0 0;
+    padding: 9px;
+    border: 1px solid var(--line);
+    border-radius: 6px;
+    background: #fff;
+    color: var(--ink);
+    font-family: inherit;
+    font-size: 11px;
+    white-space: pre-wrap;
+}
+
+.lme-offline-image-tile {
+    width: 256px;
+    height: 256px;
 }
 
 .layer-manager-count {
+    grid-area: count;
+    justify-self: end;
     color: var(--muted);
     font-size: 10px;
+    font-weight: 900;
 }
 
 .layer-manager-children {
-    padding: 0 5px 5px 18px;
+    margin-left: 4px;
+    padding: 4px 3px 5px 6px;
+    border-left: 2px solid var(--layer-group-border, #dce3e6);
+}
+
+.layer-manager-block > .layer-manager-children {
+    margin-left: 5px;
+    padding-left: 5px;
+}
+
+.layer-manager-object {
+    margin-left: 3px;
+    border-radius: 4px;
+}
+
+.layer-manager-object > summary {
+    grid-template-columns: 24px 24px minmax(0, 1fr) 46px;
+    gap: 4px;
+    padding: 3px 4px;
+}
+
+.layer-manager-object > summary > .layer-expand-button {
+    width: 24px;
+    min-width: 24px;
+    height: 24px;
+    min-height: 24px;
+    font-size: 15px;
+}
+
+.layer-manager-object > summary > .layer-drag-handle {
+    width: 24px;
+    height: 24px;
+    font-size: 15px;
+}
+
+.layer-manager-object > summary > .layer-move-buttons {
+    grid-template-columns: 22px 22px;
+}
+
+.layer-manager-object > summary > .layer-move-buttons button {
+    width: 22px;
+    height: 24px;
+}
+
+.layer-manager-object > summary .layer-rename-button,
+.layer-manager-object > summary .layer-membership-button,
+.layer-manager-object > summary .layer-remove-button {
+    min-height: 24px;
+    font-size: 9px;
 }
 
 .layer-manager-details {
     display: grid;
     gap: 2px;
-    padding: 0 8px 7px 40px;
+    padding: 0 6px 7px 12px;
     color: var(--muted);
     font-size: 10px;
 }
 
+.layer-manager-suboption {
+    display: grid;
+    grid-template-columns: 18px minmax(0, 1fr);
+    align-items: center;
+    gap: 6px;
+    min-height: 30px;
+    color: var(--ink);
+    font-size: 11px;
+    font-weight: 700;
+}
+
+.layer-manager-suboption input {
+    margin: 0;
+}
+
+.layer-manager-info {
+    display: grid;
+    gap: 2px;
+    padding: 3px 0 0 24px;
+}
+
 .layer-manager-dragging {
     opacity: 0.55;
     outline: 2px solid #2563eb;
@@ -359,6 +1000,117 @@ input[type="checkbox"] {
     box-shadow: inset 3px 0 #ff00d4;
 }
 
+.layer-manager-parent-highlighted > summary,
+.layer-manager-parent-selected > summary {
+    background: #fff0fb;
+    box-shadow: inset 3px 0 #ff00d4;
+}
+
+.layer-manager-selection-path > summary {
+    box-shadow: inset 3px 0 #ff00d4;
+}
+
+.project-command-stack {
+    display: grid;
+    gap: 8px;
+    min-width: 0;
+}
+
+.project-command-stack > * {
+    width: 100%;
+    min-width: 0;
+}
+
+.lme-edit-form,
+.attribute-editor,
+.attribute-editor-rows {
+    display: grid;
+    gap: 12px;
+}
+
+.lme-edit-form textarea,
+.attribute-editor textarea {
+    min-height: 82px;
+    resize: vertical;
+    white-space: pre-wrap;
+}
+
+.dialog-command-row {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 8px;
+}
+
+.attribute-editor > p {
+    margin: 0;
+    color: var(--muted);
+    font-size: 12px;
+}
+
+.attribute-editor-row {
+    display: grid;
+    grid-template-columns: minmax(130px, 0.8fr) minmax(180px, 2fr) 36px;
+    align-items: end;
+    gap: 8px;
+    padding-bottom: 10px;
+    border-bottom: 1px solid var(--line);
+}
+
+.attribute-editor-row > button {
+    width: 36px;
+    min-width: 36px;
+    min-height: 36px;
+    padding: 0;
+    background: #fff1f2;
+    color: #b42318;
+    font-size: 20px;
+}
+
+.object-table-legend {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px 14px;
+    margin-bottom: 8px;
+    color: var(--muted);
+    font-size: 11px;
+}
+
+.object-table-wrap input[type="checkbox"] {
+    width: 18px;
+    height: 18px;
+}
+
+.geometry-result {
+    display: grid;
+    grid-template-columns: 46px minmax(0, 1fr);
+    align-items: center;
+    gap: 12px;
+}
+
+.geometry-result > span {
+    display: grid;
+    place-items: center;
+    width: 42px;
+    height: 42px;
+    border-radius: 50%;
+    background: #dcfce7;
+    color: #166534;
+    font-size: 25px;
+    font-weight: 900;
+}
+
+.geometry-result-warning > span { background: #fef3c7; color: #92400e; }
+.geometry-result-error > span { background: #ffe4e6; color: #b42318; }
+.geometry-result > p { margin: 0; line-height: 1.45; }
+
+.lme-geometry-toolbar a {
+    display: grid !important;
+    place-items: center;
+    font-size: 20px !important;
+    font-weight: 900;
+    text-decoration: none;
+}
+
 .gps-overlay {
     position: absolute;
     top: 72px;
@@ -426,18 +1178,24 @@ input[type="checkbox"] {
     height: 38px;
 }
 
+.lme-drawing-scope-actions a[aria-disabled="true"] {
+    opacity: 0.45;
+    pointer-events: none;
+}
+
 .tool-sheet {
     position: absolute;
     top: 0;
     bottom: var(--nav-height);
-    left: 0;
+    right: 0;
+    left: auto;
     z-index: 1100;
     display: flex;
     flex-direction: column;
     width: min(430px, calc(100% - 48px));
-    border-right: 1px solid var(--line);
+    border-left: 1px solid var(--line);
     background: var(--panel);
-    box-shadow: 7px 0 24px rgba(0, 0, 0, 0.24);
+    box-shadow: -7px 0 24px rgba(0, 0, 0, 0.24);
 }
 
 .sheet-header {
@@ -868,8 +1626,15 @@ footer {
     .map-layer-panel {
         top: 68px;
         right: 8px;
-        width: min(320px, calc(100% - 16px));
+        left: auto;
-        max-height: calc(100% - 144px);
+        bottom: calc(var(--nav-height) + 8px);
+        width: 50vw;
+    }
+
+    .map-navigation-menu {
+        top: 66px;
+        right: 8px;
+        left: auto;
     }
 
     .tool-sheet {
@@ -877,11 +1642,25 @@ footer {
         bottom: var(--nav-height);
         width: 100%;
         border-top: 1px solid var(--line);
-        border-right: 0;
+        border-left: 0;
         border-radius: 8px 8px 0 0;
         box-shadow: 0 -7px 24px rgba(0, 0, 0, 0.24);
     }
 
+    .attribute-editor-row {
+        grid-template-columns: minmax(0, 1fr) 36px;
+    }
+
+    .attribute-editor-row > label {
+        grid-column: 1;
+    }
+
+    .attribute-editor-row > button {
+        grid-column: 2;
+        grid-row: 1 / span 2;
+        align-self: center;
+    }
+
     .gps-overlay {
         top: 68px;
         right: 8px;

wwwroot/index.html

@@ -31,6 +31,7 @@
     <script src="lib/googlemutant/Leaflet.GoogleMutant.js"></script>
     <script src="lib/jszip/jszip.min.js"></script>
     <script src="lib/togeojson/togeojson.umd.js"></script>
+    <script src="lib/turf/turf.min.js"></script>
     <script src="js/lme-map.js"></script>
 
 </body>

wwwroot/lib/turf/turf.min.js

@@ -0,0 +1,37 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((t="undefined"!=typeof globalThis?globalThis:t||self).turf={})}(this,(function(t){"use strict";function e(t,e){(null==e||e>t.length)&&(e=t.length);for(var n=0,r=Array(e);n<e;n++)r[n]=t[n];return r}function n(t){if(Array.isArray(t))return t}function r(t,e,n){return e=l(e),function(t,e){if(e&&("object"==typeof e||"function"==typeof e))return e;if(void 0!==e)throw new TypeError("Derived constructors may only return object or undefined");return function(t){if(void 0===t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return t}(t)}(t,c()?Reflect.construct(e,n||[],l(t).constructor):e.apply(t,n))}function i(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function o(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,y(r.key),r)}}function s(t,e,n){return e&&o(t.prototype,e),n&&o(t,n),Object.defineProperty(t,"prototype",{writable:!1}),t}function a(t,e){var n="undefined"!=typeof Symbol&&t[Symbol.iterator]||t["@@iterator"];if(!n){if(Array.isArray(t)||(n=_(t))||e){n&&(t=n);var r=0,i=function(){};return{s:i,n:function(){return r>=t.length?{done:!0}:{done:!1,value:t[r++]}},e:function(t){throw t},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,s=!0,a=!1;return{s:function(){n=n.call(t)},n:function(){var t=n.next();return s=t.done,t},e:function(t){a=!0,o=t},f:function(){try{s||null==n.return||n.return()}finally{if(a)throw o}}}}function u(t,e,n){return(e=y(e))in t?Object.defineProperty(t,e,{value:n,enumerable:!0,configurable:!0,writable:!0}):t[e]=n,t}function l(t){return l=Object.setPrototypeOf?Object.getPrototypeOf.bind():function(t){return t.__proto__||Object.getPrototypeOf(t)},l(t)}function h(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function");t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,writable:!0,configurable:!0}}),Object.defineProperty(t,"prototype",{writable:!1}),e&&p(t,e)}function c(){try{var t=!Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],(function(){})))}catch(t){}return(c=function(){return!!t})()}function f(t){if("undefined"!=typeof Symbol&&null!=t[Symbol.iterator]||null!=t["@@iterator"])return Array.from(t)}function g(){throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}function p(t,e){return p=Object.setPrototypeOf?Object.setPrototypeOf.bind():function(t,e){return t.__proto__=e,t},p(t,e)}function v(t,e){return n(t)||function(t,e){var n=null==t?null:"undefined"!=typeof Symbol&&t[Symbol.iterator]||t["@@iterator"];if(null!=n){var r,i,o,s,a=[],u=!0,l=!1;try{if(o=(n=n.call(t)).next,0===e){if(Object(n)!==n)return;u=!1}else for(;!(u=(r=o.call(n)).done)&&(a.push(r.value),a.length!==e);u=!0);}catch(t){l=!0,i=t}finally{try{if(!u&&null!=n.return&&(s=n.return(),Object(s)!==s))return}finally{if(l)throw i}}return a}}(t,e)||_(t,e)||g()}function d(t){return function(t){if(Array.isArray(t))return e(t)}(t)||f(t)||_(t)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}()}function y(t){var e=function(t,e){if("object"!=typeof t||!t)return t;var n=t[Symbol.toPrimitive];if(void 0!==n){var r=n.call(t,e||"default");if("object"!=typeof r)return r;throw new TypeError("@@toPrimitive must return a primitive value.")}return("string"===e?String:Number)(t)}(t,"string");return"symbol"==typeof e?e:e+""}function m(t){return m="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},m(t)}function _(t,n){if(t){if("string"==typeof t)return e(t,n);var r={}.toString.call(t).slice(8,-1);return"Object"===r&&t.constructor&&(r=t.constructor.name),"Map"===r||"Set"===r?Array.from(t):"Arguments"===r||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r)?e(t,n):void 0}}var x=6371008.8,E={centimeters:100*x,centimetres:100*x,degrees:360/(2*Math.PI),feet:3.28084*x,inches:39.37*x,kilometers:x/1e3,kilometres:x/1e3,meters:x,metres:x,miles:x/1609.344,millimeters:1e3*x,millimetres:1e3*x,nauticalmiles:x/1852,radians:1,yards:1.0936*x},k={acres:247105e-9,centimeters:1e4,centimetres:1e4,feet:10.763910417,hectares:1e-4,inches:1550.003100006,kilometers:1e-6,kilometres:1e-6,meters:1,metres:1,miles:386e-9,nauticalmiles:2.9155334959812285e-7,millimeters:1e6,millimetres:1e6,yards:1.195990046};function b(t,e){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r={type:"Feature"};return(0===Line truncated
+/*!
+   * Copyright (c) 2019, Dane Springmeyer
+   *
+   * Redistribution and use in source and binary forms, with or without
+   * modification, are permitted provided that the following conditions are
+   * met:
+   *
+   *     * Redistributions of source code must retain the above copyright
+   *       notice, this list of conditions and the following disclaimer.
+   *     * Redistributions in binary form must reproduce the above copyright
+   *       notice, this list of conditions and the following disclaimer in
+   *       the documentation and/or other materials provided with the
+   *       distribution.
+   *
+   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+   */
+function ta(t){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=[];if(mt(t,(function(t){n.push(t.coordinates)})),n.length<2)throw new Error("Must specify at least 2 geometries");var r=Rs.apply(Fs,[n[0]].concat(d(n.slice(1))));return 0===r.length?null:1===r.length?S(r[0],e.properties):R(r,e.properties)}function ea(t,e){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=JSON.stringify(n.properties||{}),i=v(t,4),o=i[0],s=i[1],a=i[2],u=i[3],l=(s+u)/2,h=(o+a)/2,c=2*e/ut([o,l],[a,l],n)*(a-o),f=2*e/ut([h,s],[h,u],n)*(u-s),g=c/2,p=2*g,d=Math.sqrt(3)/2*f,y=a-o,m=u-s,_=3/4*p,x=d,E=(y-p)/(p-g/2),k=Math.floor(E),b=(k*_-g/2-y)/2-g/2+_/2,w=Math.floor((m-d)/d),I=(m-w*d)/2,N=w*d-m>d/2;N&&(I-=d/4);for(var S=[],M=[],L=0;L<6;L++){var P=2*Math.PI/6*L;S.push(Math.cos(P)),M.push(Math.sin(P))}for(var T=[],O=0;O<=k;O++)for(var R=0;R<=w;R++){var A=O%2==1;if((0!==R||!A)&&(0!==R||!N)){var D=O*_+o-b,F=R*x+s+I;if(A&&(F-=d/2),!0===n.triangles)ra([D,F],c/2,f/2,JSON.parse(r),S,M).forEach((function(t){n.mask?ta(C([n.mask,t]))&&T.push(t):T.push(t)}));else{var q=na([D,F],c/2,f/2,JSON.parse(r),S,M);n.mask?ta(C([n.mask,q]))&&T.push(q):T.push(q)}}}return C(T)}function na(t,e,n,r,i,o){for(var s=[],a=0;a<6;a++){var u=t[0]+e*i[a],l=t[1]+n*o[a];s.push([u,l])}return s.push(s[0].slice()),S([s],r)}function ra(t,e,n,r,i,o){for(var s=[],a=0;a<6;a++){var u=[];u.push(t),u.push([t[0]+e*i[a],t[1]+n*o[a]]),u.push([t[0]+e*i[(a+1)%6],t[1]+n*o[(a+1)%6]]),u.push(t),s.push(S([u],r))}return s}function ia(t,e){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};n.mask&&!n.units&&(n.units="kilometers");for(var r=[],i=t[0],o=t[1],s=t[2],a=t[3],u=e/ut([i,o],[s,o],n)*(s-i),l=e/ut([i,o],[i,a],n)*(a-o),h=s-i,c=a-o,f=Math.floor(h/u),g=(c-Math.floor(c/l)*l)/2,p=i+(h-f*u)/2;p<=s;){for(var v=o+g;v<=a;){var d=I([p,v],n.properties);n.mask?Cn(d,n.mask)&&r.push(d):r.push(d),v+=l}p+=u}return C(r)}function oa(t,e,n){for(var r=arguments.length>3&&void 0!==arguments[3]?arguments[3]:{},i=[],o=t[0],s=t[1],a=t[2],u=t[3],l=a-o,h=j(e,r.units,"degrees"),c=u-s,f=j(n,r.units,"degrees"),g=Math.floor(Math.abs(l)/h),p=Math.floor(Math.abs(c)/f),v=(c-p*f)/2,d=o+(l-g*h)/2,y=0;y<g;y++){for(var m=s+v,_=0;_<p;_++){var x=S([[[d,m],[d,m+f],[d+h,m+f],[d+h,m],[d,m]]],r.properties);r.mask?Oe(r.mask,x)&&i.push(x):i.push(x),m+=f}d+=h}return C(i)}function sa(t,e){return oa(t,e,e,arguments.length>2&&void 0!==arguments[2]?arguments[2]:{})}function aa(t,e){for(var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=[],i=e/ut([t[0],t[1]],[t[2],t[1]],n)*(t[2]-t[0]),o=e/ut([t[0],t[1]],[t[0],t[3]],n)*(t[3]-t[1]),s=0,a=t[0];a<=t[2];){for(var u=0,l=t[1];l<=t[3];){var h=null,c=null;s%2==0&&u%2==0?(h=S([[[a,l],[a,l+o],[a+i,l],[a,l]]],n.properties),c=S([[[a,l+o],[a+i,l+o],[a+i,l],[a,l+o]]],n.properties)):s%2==0&&u%2==1?(h=S([[[a,l],[a+i,l+o],[a+i,l],[a,l]]],n.properties),c=S([[[a,l],[a,l+o],[a+i,l+o],[a,l]]],n.properties)):u%2==0&&s%2==1?(h=S([[[a,l],[a,l+o],[a+i,l+o],[a,l]]],n.properties),c=S([[[a,l],[a+i,l+o],[a+i,l],[a,l]]],n.properties)):u%2==1&&s%2==1&&(h=S([[[a,l],[a,l+o],[a+i,l],[a,l]]],n.properties),c=S([[[a,l+o],[a+i,l+o],[a+i,l],[a,l+o]]],n.properties)),n.mask?(ta(C([n.mask,h]))&&r.push(h),ta(C([n.mask,c]))&&r.push(c)):(r.push(h),r.push(c)),l+=o,u++}s++,a+=i}return C(r)}
+/*!
+  * MarchingSquaresJS
+  * version 1.3.3
+  * https://github.com/RaumZeit/MarchingSquares.js
+  *
+  * @license GNU Affero General Public License.
+  * Copyright (c) 2015-2019 Ronny Lorenz <ronny@tbi.univie.ac.at>
+  */
+function ua(t,e,n){return t<e?(n-t)/(e-t):(t-n)/(t-e)}function la(t,e,n,r){var i;return n>r&&(i=n,n=r,r=i),t<e?t<n?(n-t)/(e-t):(r-t)/(e-t):t>r?(t-r)/(t-e):(t-n)/(t-e)}function ha(t,e,n,r){return t<e?(n-t)/(e-t):(t-r)/(t-e)}function ca(t,e,n,r){return t<e?(r-t)/(e-t):(t-n)/(t-e)}function fa(){this.successCallback=null,this.verbose=!1,this.polygons=!1,this.polygons_full=!1,this.linearRing=!0,this.noQuadTree=!1,this.noFrame=!1}function ga(t,e,n,r){var i=[];return t.polygons.forEach((function(t){t.forEach((function(t){t[0]+=e,t[1]+=n})),r.linearRing&&t.push(t[0]),i.push(t)})),i}function pa(t,e,n,r){return 0===n?(t+=1,e+=r[0][1]):1===n?t+=r[0][0]:2===n?e+=r[0][1]:3===n&&(t+=r[0][0],e+=1),[t,e]}function va(t,e,n){return 0===n?t++:1===n||(2===n?e++:3===n&&(t++,e++)),[t,e]}function da(t,e,n,r,i){var o=r,s=i,a=0,u=0;if(this.x=e,this.y=n,this.lowerBound=null,this.upperBound=null,this.childA=null,this.childB=null,this.childC=null,this.childD=null,1===r&&1===i)this.lowerBound=Math.min(t[n][e],t[n][e+1],t[n+1][e+1],t[n+1][e]),this.upperBound=Math.max(t[n][e],t[n][e+1],t[n+1][e+1],t[n+1][e]);else{if(r>1){for(;0!==o;)o>>=1,a++;r===1<<a-1&&a--,o=1<<a-1}if(i>1){for(;0!==s;)s>>=1,u++;i===1<<u-1&&u--,s=1<<u-1}this.childA=new da(t,e,n,o,s),this.lowerBound=this.childA.lowerBound,this.upperBound=this.childA.upperBound,r-o>0&&(this.childB=new da(t,e+o,n,r-o,s),this.lowerBound=Math.min(this.lowerBound,this.childB.lowerBound),this.upperBound=Math.max(this.upperBound,this.childB.upperBound),i-s>0&&(this.childC=new da(t,e+o,n+s,r-o,i-s),this.lowerBound=Math.min(this.lowerBound,this.childC.lowerBound),this.upperBound=Math.max(this.upperBound,this.childC.upperBound))),i-s>0&&(this.childD=new da(t,e,n+s,o,i-s),this.lowerBound=Math.min(this.lowerBound,this.childD.lowerBound),this.upperBound=Math.max(this.upperBound,this.childD.upperBound))}}function ya(t){var e,n;if(!t)throw new Error("data is required");if(!Array.isArray(t)||!Array.isArray(t[0]))throw new Error("data must be scalar field, i.e. array of arrays");if(t.length<2)throw new Error("data must contain at least two rows");if((n=t[0].length)<2)throw new Error("data must contain at least two columns");for(e=1;e<t.length;e++){if(!Array.isArray(t[e]))throw new Error("Row "+e+" is not an array");if(t[e].length!=n)throw new Error("unequal row lengths detected, please provide a regular grid")}this.data=t,this.root=new da(t,0,0,t[0].length-1,t.length-1)}function ma(t,e,n){var r,i,o,s=!1,a=!1,u=null,l=null,h=null,c=null,f=null,g=[];if(!t)throw new Error("data is required");if(null==e)throw new Error("threshold is required");if(n&&"object"!==m(n))throw new Error("options must be an object");if(r=function(t){var 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